Abstract: A computer-implemented method for providing an objective evaluation to a customer service representative regarding his performance during an interaction with a customer may include receiving a digitized data stream corresponding to a spoken conversation between a customer and a representative; converting the data stream to a text stream; generating a representative transcript that includes the words from the text stream that are spoken by the representative; comparing the representative transcript with a plurality of positive words and a plurality of negative words; and generating a score that varies according to the occurrence of each word spoken by the representative that matches one of the positive words, and/or the occurrence of each word spoken by the representative that matches one of the negative words. Tone of voice, as well as response time, during the interaction may also be monitored and analyzed to adjust the score, or generate a separate score.

Abstract: A method for changing types of streamed content for an audio system in which a first type of streamed content that has a first signal type is received at the audio system and arrangements are made to begin receiving at the audio system a second type of streamed content, where the second type of streamed content has a second signal type that is different than the first signal type.

Abstract: Embodiments of the present invention are directed to a hybrid system for analog audio processing with digital control. The hybrid system utilizes an analog processing box (APB) that is coupled with a computer to digitally control parameter calculations and other parts of the system, and for parameter automation and parameter preset recall. The APB includes algorithms that are implemented in the analog domain using a combination of raw algorithm functions and is configurable such that selected analog algorithm(s) can be realized using the same analog implementation. The APB lacks external, physical moving controls and internal circuitry to calculate control signals. Instead, control signals are transmitted with audio signals in complete synchronization from the computer to the APB via a single path for the control of the APB. The selected analog algorithm is configurable based on modification of side-chain, signal processing that is performed outside of the APB.

Abstract: An apparatus (100) comprises a signal generator (101) that is set up to produce a digital random signal (191). The apparatus (100) also comprises at least one filter element (102, 121, 122) that is set up to apply a high pass filter and a low pass filter to the digital random signal (191) in order to produce a spectrally shaped random signal (112). The apparatus (100) also comprises a modulator (103) that is set up to apply the spectrally shaped random signal (192) as dither.

Abstract: A method to watermark an audio signal includes inserting a first symbol in a spectral well, the spectral well corresponding to at least one of a second spectral portion when amplitude of a first spectral portion and amplitude of a third spectral portion exceed amplitude of the second spectral portion, or the second temporal portion when amplitude of a first temporal portion and amplitude of a third temporal portion exceed amplitude of the second temporal portion.

Abstract: Described are various embodiments of a system and method in which device-identifying data can be used to uniquely recognize and optionally track and report on device activity at one or more hotspot locations by way of the creation and management of a device profile uniquely associated with such devices and stored in a network accessible knowledge base.

Abstract: A system for providing feedback regarding detectability of a watermark message produced by a watermarking encoder includes a simulation module configured to combine at least one of a watermarked signal or an enhanced watermarked signal with a simulated environment signal that corresponds to an expected listening environment of the at least one of the watermarked signal or the enhanced watermarked signal, and output a simulated environment-modified watermarked signal corresponding to the combination of the at least one of the watermarked signal or the enhanced watermarked signal with the simulated environment signal, and a monitoring module configured to generate a watermark detectability indication based on the simulated environment-modified watermarked signal.

Abstract: Providing feedback regarding detectability of a watermark message produced by a watermarking encoder may include receiving a watermark detectability indication corresponding to detectability of the watermark message, and determining an enhancement indication corresponding to a prescribed enhancement to a watermark signal in which the watermark message is embedded based on the watermark detectability indication.

Abstract: A local content server system (LCS) for creating a secure environment for digital content is disclosed, which system comprises: a communications port in communication for connecting the LCS via a network to at least one Secure Electronic Content Distributor (SECD), which SECD is capable of storing a plurality of data sets, is capable of receiving a request to transfer at least one content data set, and is capable of transmitting the at least one content data set in a secured transmission; a rewritable storage medium whereby content received from outside the LCS may be stored and retrieved; a domain processor that imposes rules and procedures for content being transferred between the LCS and devices outside the LCS; and a programmable address module which can be programmed with an identification code uniquely associated with the LCS. The LCS is provided with rules and procedures for accepting and transmitting content data.

Abstract: Systems and/or processes related but not limited to a machine configured to create a physical reality of receiving a level-one encrypted output of a surveillance device; a machine configured to create a physical reality of decrypting at least a part of the level-one encrypted output of the surveillance device with a level-one decryption key that is practicably inaccessible by a level-one encryption entity; and a machine configured to create a physical reality of transmitting a plaintext output of the surveillance device. Other machines/processes are also disclosed/claimed.

Abstract: A system for monitoring detectability of a watermark message produced by a watermarking encoder includes an input that receives a watermarked signal having spectral channels in which the watermark message is embedded. The system also includes channel separators each associated with a respective spectral channel of the watermarked signal and configured to separate the watermarked signal into spectral channels. The system also includes bin separators configured to separate the spectral channels into frequency bins. The system also includes a detector configured to detect a frequency bin corresponding to a symbol that appears in a plurality of the spectral channels. The system also includes a detectability estimator configured to establish a measure of the detectability of the watermark message embedded in the watermarked signal based at least in part on the frequency bin corresponding to the symbol that appears in the plurality of the spectral channels.

Abstract: A local content server system (LCS) for creating a secure environment for digital content is disclosed, which system comprises: a communications port in communication for connecting the LCS via a network to at least one Secure Electronic Content Distributor (SECD), which SECD is capable of storing a plurality of data sets, is capable of receiving a request to transfer at least one content data set, and is capable of transmitting the at least one content data set in a secured transmission; a rewritable storage medium whereby content received from outside the LCS may be stored and retrieved; a domain processor that imposes rules and procedures for content being transferred between the LCS and devices outside the LCS; and a programmable address module which can be programmed with an identification code uniquely associated with the LCS. The LCS is provided with rules and procedures for accepting and transmitting content data.

Abstract: Provided are a method and apparatus for transmitting digital multimedia broadcasting data, and a method and apparatus for receiving digital multimedia broadcasting data. A basic audio signal and a multichannel audio signal are encoded to generate a basic audio stream and a multichannel audio stream, and a first data stream describing property and position data of the basic audio stream and a second data stream describing property and position data of the multichannel audio stream are transmitted as independent streams. According to the performance of the receiving apparatus, an audio signal may be decoded by using just the first data stream only or both the first data stream and the second stream.

Abstract: In a data structure of a multimedia file format, a movie box and a media data box are provided. In each box, a non-encrypted size field, a non-encrypted type field and box data field are provided. In box data of the movie box, information data regarding multimedia data is stored. The multimedia data is encrypted and stored in box data of the media data box. The information data is obtained by referring to the container in the movie box. This information data is held as encryption and encoding information data. By referring to the information data, a data unit of the encrypted multimedia data in the media data box is obtained, and the unit data is decrypted.

Abstract: Methods, systems, and apparatus are disclosed which enable flexible insertion of forensic watermarks into a digital content signal using a common customization function. The common customization function flexibly employs a range of different marking techniques that are applicable to a wide range of forensic marking schemes. These customization functions are also applicable to pre-processing and post-processing operations that may be necessary for enhancing the security and transparency of the embedded marks, as well as improving the computational efficiency of the marking process. The common customization function supports a well-defined set of operations specific to the task of forensic mark customization that can be carried out with a modest and preferably bounded effort on a wide range of devices. This is accomplished through the use of a generic transformation technique for use as a “customization” step for producing versions of content forensically marked with any of a multiplicity of mark messages.

Abstract: Methods and apparatus for mixing encrypted data with unencrypted data are disclosed. A disclosed system receives data from a first media source, such as DVD-Audio content, and encrypts the data from the first media source using a key stream to form an encrypted data stream. The disclosed system may separate the encrypted data stream into a plurality of encrypted data streams and may combine the plurality of encrypted data streams with an unencrypted data stream associated with a second media source to form a mixed data stream. The mixed data stream is formed without decrypting the plurality of encrypted data streams and is transmitted to hardware or a hardware driver.

Abstract: A voice and screen capture archive and review process that enables a user to manage and evaluate customer service representative interactions with customers. An audio recording and a video recording of the computer screen of the customer service representative are captured and encrypted and merged together into a formatted file. The formatted file is stored on a storage server for access by the user. Through a web based API, the user can access the stored files and playback the interaction between the customer service representative and the customer for evaluation and training purposes.

Abstract: A marker is derived from an interaction between a person and an agent of a business and the agent's user interface. A part of a speech signal that corresponds to a portion of the person's special information is located with the marker. The speech signal results from the interaction between the person and the agent. The part of the speech signal that corresponds to the portion of the person's special information is rendered unintelligible.

Abstract: A method for performing video communication is provided. The method includes: creating and saving a bio key using a user's biological information before first and second terminals perform the video communication; establishing a session, wherein the first terminal requests voice communication with the second terminal; exchanging bio keys saved in the respective terminals and saving the same; starting a Secure Real-Time Transport Protocol (SRTP) session, wherein the first and second terminals create a session sharing key using the exchanged bio keys; creating a restored bio key by obtaining the biological information from data received by first and second terminals and performing a user certification by comparing the bio key with the restored bio key.

Abstract: Advanced solutions for encrypting multi-layer audio data are required, ie. audio data that comprise a base layer and one or more enhancement layers. A method for encrypting such an encoded audio signal comprises separating the base layer into two sections, encrypting the side information within frames of the second section of the base layer, and encrypting at least a part of the data of the enhancement layer, wherein the encrypted section of the base layer and the encrypted enhancement layer require different decryption keys for decryption. Thus, free preview zones are possible to implement.

Abstract: Provided are a method and apparatus for sinusoidal audio coding, which employs a tracking method for further effective coding of sinusoids extracted in the process of a sinusoidal analysis of parametric coding. The sinusoidal audio coding method includes: extracting sinusoids of a current frame by performing a sinusoidal analysis on an input audio signal; with respect to each of the extracted sinusoids, setting a mode selected from a birth mode in which a sinusoid is newly generated irrespective of sinusoids of a previous frame, a continuation mode in which the sinusoid is only one sinusoid continued from one of the sinusoids of the previous frame, and a branch mode in which the sinusoid is one of a plurality of sinusoids continued from one of the sinusoids of the previous frame; and coding the extracted sinusoids according to the selected mode. Accordingly, a plurality of sinusoids that can be continued from one previous track component are set to the continuation mode or the branch mode.

Abstract: Encrypted content streaming is provided by a method comprising holding an encrypted content stream that is cryptographically encrypted from a content stream with a content key, and holding an encrypted content key that is cryptographically encrypted from the content key with one or more intermediate encryption keys. The method further comprises serving the encrypted content stream to a plurality of content consumption devices, wherein the encrypted content stream is embedded with a leaf license comprising the encrypted content key, and wherein the encrypted content stream is cryptographically decryptable by a content consumption device having a scalable root license providing one or more intermediate root keys from which the content consumption device derives the one or more intermediate decryption keys paired to the one or more intermediate encryption keys.

Abstract: Methods of steganographically encoding auxiliary data into audio and decoding the auxiliary data. In an encoding method, a processor maps the auxiliary data to samples in the audio data. A processor modifies the mapping of the auxiliary data to the samples over time. A processor modifies a feature of the samples of the audio data to which the code signals are mapped to convey the auxiliary data substantially imperceptibly in the audio data. In a decoding method, a processor performs decoding of a multibit auxiliary code embedded in an audio signal. A processor decodes code values of the auxiliary code from two or more different portions of the audio signal, each having the multibit auxiliary code. A processor combines the code values decoded from the two or more different portions of the audio signal to determine the code values of the auxiliary code.

Abstract: A local content server system (LCS) for creating a secure environment for digital content is disclosed, which system comprises: a communications port in communication for connecting the LCS via a network to at least one Secure Electronic Content Distributor (SECD), which SECD is capable of storing a plurality of data sets, is capable of receiving a request to transfer at least one content data set, and is capable of transmitting the at least one content data set in a secured transmission; a rewritable storage medium whereby content received from outside the LCS may be stored and retrieved; a domain processor that imposes rules and procedures for content being transferred between the LCS and devices outside the LCS; and a programmable address module which can be programmed with an identification code uniquely associated with the LCS. The LCS is provided with rules and procedures for accepting and transmitting content data.

Abstract: Various quality versions of an electronic content are defined, and one or more distortion algorithms (22, 32) that are executable to generate a lower quality version of the electronic content by a distortion of the highest quality version (21, 31) are defined. Each quality version is selectively assigned a content key (CK) whereby an electronic content player (34, 70) will have the appropriate information when decrypting, decoding, and/or distorting the highest quality version (21, 31) of the electronic content.

Abstract: A digital differential steganographic system and method includes a master key that is generated from an unmarked media, a mark-point reservoir created from the unmarked media and containing a set of viable candidate mark points for the unmarked media, and a mark-point applicator to insert data into the unmarked media at selected mark-points chosen from the mark-point reservoir creating a digital watermark. The method includes using an original unmarked media, shaping and testing marks in the original media for predictable distortion, verifying embedded marks at point of insertion in the original media, minimizing mark energy and duration for least-perceptible change, and using non-distributed, unmarked media of the original media as a master key.

Abstract: A system for identifying audio data is provided. The system includes a transform system receiving left channel audio data and right channel audio data and generating a plurality of frequency bins of left channel magnitude data, left channel phase data, right channel magnitude data and right channel phase data. A watermarking system receives watermarking data and modifies predetermined frequency bins of the left channel phase data and the right channel phase data to encode the watermarking data. A magnitude system receives the left channel magnitude data and the right channel magnitude data and increases the left channel magnitude data and the right channel magnitude data for one or more of the predetermined frequency bins to a threshold level if the left channel magnitude data and the right channel magnitude data for the corresponding frequency bin is less than the threshold level.

Abstract: A multifunction device for television set and a method to enhance video content provided to a display device of said television set. The multifunction device comprises an input for receiving audio/video data from an audio/video content data source, an output for outputting audio/video data to the display device, and communication means for accessing Internet or a local area network for collecting additional data. The multifunction device being connected and powered by a common interface of the display device further comprises image processing means configured for receiving first image data from the input, a converter configured for receiving additional data from Internet or a local area network and for converting said additional data into additional image data, an image merging module configured for combining said additional image data with all or part of the input first image data to obtain second image data to be forwarded to the output connected to the display device.

Abstract: A proprietary portable audio player system for protecting digital content copyrights, which includes a proprietary portable audio player, a web access interface, and an online music server. The proprietary portable audio player has a hardware unique device identity. The proprietary portable audio player has a playback token acquirement mode and uses a first transmission medium to link with the online music server to thereby obtain a playback token for a corresponding music file playback. The online music server pre-stores a plurality of music files with compression formats, a plurality of playback tokens, and a mapping table. When a playback token signal from the web access interface is received, the online music server accordingly issues a playback token corresponding to a specific music file, updates the mapping table, and sends the playback token to the proprietary portable audio player through the first transmission medium.

Abstract: Digital watermark detection apparatus including detection units which calculate detected values of watermark signals by use of keys for PCM data of channels of audio content, a plurality of units which add the detected values corresponding to each of the channels and each of the keys for each possible combination of the respective channels and the respective keys, and a unit which selects and outputs one adding result from the respective adding results by the plurality of detected value adding units. Moreover, it includes units which accumulate the detected values in accumulation cycles different from one another to restore messages embedded as digital watermarks from the accumulated detected values, and perform boundary detection of the audio contents to detect the audio contents in which the digital watermarks are embedded, and a detection result output unit which synthesizes and outputs respective processing results by the message restoration units.

Abstract: In one embodiment, a technique for enhancing the inspection of data sent from a server is provided. By modifying a client request in an effort to prevent the transformation (e.g., encoding and/or compression) of data by the server, unencoded data may be received, which can be inspected without the overhead associated with first decoding the data. Further, in the event the data is encoded despite modifying the client request to prevent such encoding, the server may be untrustworthy and one or more appropriate actions may be taken.

Abstract: A marker is derived from an interaction between a person and an agent of a business and the agent's user interface. A part of a speech signal that corresponds to a portion of the person's special information is located with the marker. The speech signal results from the interaction between the person and the agent. The part of the speech signal that corresponds to the portion of the person's special information is rendered unintelligible.

Abstract: Methods and apparatuses for media playback system are disclosed, including a signal source for providing electrical signal representing media content; a processing unit for processing signal from the signal source; a distorting unit for introducing distortion to signal from the processing unit; a transducer for converting the electrical signal from the distorting unit to energy representing the media content; and a connection link for transmitting the signal from the distorting unit to the transducer. The arrangement protects media content against unauthorized duplication by ripping-off the transmitting signal.

Abstract: Unit for secure processing access controlled audio/video data capable of receiving control messages(ECM) comprising at least one first control word (CW1) and first right execution parameters (C1), at least one second control word (CW2) and second right execution parameters (C2), said processing unit being connected to a first access control device (CA1), said processing unit is characterized in that it comprises: —means for verifying and applying the first right execution parameters (C1) in relation to the contents of a memory (M1) of said first access control device (CA1) and means for obtaining the first control word CW1, —a second access control device (CA2) integrated into the processing unit UT including means for verifying and applying the second right execution parameters (C2) in relation to the contents of a memory (M2) associated to said second access control device (CA2) and means for obtaining the second control word (CW2), —a deciphering module (MD) capable of deciphering, sequentially with the fi

Abstract: A CableCARD device for manipulation of a stream of data has an inband data input for receiving a stream of video data from a host, the stream of video data being encrypted and encoded according to a first coding. A decrypter decrypts the encrypted data. A transcoder transcodes the stream of video data to convert the stream of video data to a second coding, producing a transcoded data stream. An encrypter encrypts the transcoded data stream. An inband data output sends the encrypted transcoded data stream back to the host. This abstract should not be considered limiting, since other embodiments may incorporate more, fewer or different elements that those described in this abstract.

Abstract: Described herein is an implementation that produces a new representation of a digital good (such as an image) in a new defined representation domain. In particular, the representations in this new domain are based upon matrix invariances. In some implementations, the matrix invariances may, for example, heavily use singular value decomposition (SVD).

Abstract: Methods and apparatus for securely streaming multimedia packets, such as RTP packets, are disclosed, in which the payloads of the packets are shuffled. This reordering is performed using a shuffling function that depends on sequence numbers associated with each of the packets, a pre-determined group size N, and a pre-determined initialization value; in some embodiments this shuffling function comprises a cryptographic hashing function or other one-way function. A receiving device may reverse the shuffling, using a similar shuffling function, if the pre-determined group size N and the pre-determined initialization value are known.

Abstract: A system, method and various software tools enable a video hosting website to automatically identified unlicensed audio content in video files uploaded by users, and initiate a process by which the user can replace the unlicensed content with licensed audio content. An audio replacement tool is provided that enables the user to permanently mute the original, unlicensed audio content of a video file, or select a licensed audio file from a collection of licensed audio, and insert the selected in place of the original audio. Where a video file includes unlicensed audio, the video hosting website provides access to video files to a client device, along with an indication to the client device to mute the audio during playback of the video.

Abstract: Techniques are disclosed for multiplexing a dynamic bit-rate video stream with an audio stream received by a client device in a manner that allows the resulting multiplexed stream to be played back without disruption, despite dynamic changes in the bit rate of the video stream that may occur. A content server may stream both a video stream and an audio stream to a client device for playback. The client device may multiplex the video and audio streams prior to them being presented to a playback engine for decoding and playback to a user.

Abstract: A method for performing video communication is provided. The method includes: creating and saving a bio key using a user's biological information before first and second terminals perform the video communication; establishing a session, wherein the first terminal requests voice communication with the second terminal; exchanging bio keys saved in the respective terminals and saving the same; starting a Secure Real-Time Transport Protocol (SRTP) session, wherein the first and second terminals create a session sharing key using the exchanged bio keys; creating a restored bio key by obtaining the biological information from data received by first and second terminals and performing a user certification by comparing the bio key with the restored bio key.

Abstract: A system for multi-stream security processing and distributing digital media streams includes a headend, a network, and at least one receiver. The headend is generally configured to generate encrypted digital media streams. The network may be coupled to the headend and configured to receive the encrypted digital media streams. The at least one receiver may be coupled to the network and configured to receive the encrypted digital media streams and present a decrypted version of the encrypted digital media streams. At least one of the headend and the at least one receiver include a security processor that may be configured to provide at least one of simultaneous multiple encryption and simultaneous multiple decryption processing of the digital media streams.

Abstract: A method for combining transfer functions with predetermined key creation. In one embodiment, digital information, including a digital sample and format information, is protected by identifying and encoding a portion of the format information. Encoded digital information, including the digital sample and the encoded format information, is generated to protect the original digital information. In another embodiment, a digital signal, including digital samples in a file format having an inherent granularity, is protected by creating a predetermined key. The predetermined key is comprised of a transfer function-based mask set to manipulate data at the inherent granularity of the file format of the underlying digitized samples.

Abstract: A content assessment apparatus, content assessment method, information reproducing apparatus, and information recording medium are provided that can determine whether digital content has been processed abnormally.

Abstract: Methods and apparatus for a smartcard system are provided which securely and conveniently provides for secure transaction completion in a contact or contactless environment. The invention utilizes selection of processing applications based on the account issuer parameters and risk factors (stored on a smartcard) and merchant system parameters and risk factors (stored on a merchant system database). The invention permits a merchant system and smartcard to exchange information useful for determining if particular transactions should be completed online or offline.

Abstract: Four related but independent aspects are described: (1) a method and a system to derive mesh surface descriptions (also called connectivity-wireframes) and material properties from objects represented as a scalar field (e.g. discrete multi-dimensional data), scalar functions (e.g. implicit surfaces) or any other surface description, (2) a compact, optionally multi-scalable, optionally view-dependent, optionally animation-friendly, multi-dimensional surface representation method and system comprising a combination of a surface mesh description and material properties associated with a reference grid, (3) a digital coding and decoding method and system of a combined surface mesh representation with connectivity information and material properties and a reference grid, and (4) a method and system for conversion of other surface descriptions to the combined surface mesh representation and reference grid.

Abstract: A method of converting audio data encrypted for anti-piracy and copyright protection to a suitable format so that the data can be played in a portable device. A computer first decrypts the encrypted audio data and inserts information for setting equalizer, then encrypts the audio data lightly with the information for setting equalizer and transmits the data to a portable device. The portable device sets equalizer suitable to the lightly-encrypted audio data using the information for setting equalizer inserted by the computer, then decrypts the lightly-encrypted audio data, and outputs the decrypted audio data while amplifying or attenuating audio data for each band according to the set equalizer. Therefore, heavily encrypted audio data can be playable in a portable device with relatively low computing power and, by setting equalizer mode suitable to a music genre, the audio data can be conveyed to a listener authentically.

Abstract: A method of converting audio data encrypted for anti-piracy and copyright protection to a suitable format so that the data can be played in a portable device. A computer first decrypts the encrypted audio data and inserts information for setting equalizer, then encrypts the audio data lightly with the information for setting equalizer and transmits the data to a portable device. The portable device sets equalizer suitable to the lightly-encrypted audio data using the information for setting equalizer inserted by the computer, then decrypts the lightly-encrypted audio data, and outputs the decrypted audio data while amplifying or attenuating audio data for each band according to the set equalizer. Therefore, heavily encrypted audio data can be playable in a portable device with relatively low computing power and, by setting equalizer mode suitable to a music genre, the audio data can be conveyed to a listener authentically.

Abstract: A method of converting audio data encrypted for anti-piracy and copyright protection to a suitable format so that the data can be played in a portable device. A computer first decrypts the encrypted audio data and inserts information for setting equalizer, then encrypts the audio data lightly with the information for setting equalizer and transmits the data to a portable device. The portable device sets equalizer suitable to the lightly-encrypted audio data using the information for setting equalizer inserted by the computer, then decrypts the lightly-encrypted audio data, and outputs the decrypted audio data while amplifying or attenuating audio data for each band according to the set equalizer. Therefore, heavily encrypted audio data can be playable in a portable device with relatively low computing power and, by setting equalizer mode suitable to a music genre, the audio data can be conveyed to a listener authentically.

Abstract: A method of converting audio data encrypted for anti-piracy and copyright protection to a suitable format so that the data can be played in a portable device. A computer first decrypts the encrypted audio data and inserts information for setting equalizer, then encrypts the audio data lightly with the information for setting equalizer and transmits the data to a portable device. The portable device sets equalizer suitable to the lightly-encrypted audio data using the information for setting equalizer inserted by the computer, then decrypts the lightly-encrypted audio data, and outputs the decrypted audio data while amplifying or attenuating audio data for each band according to the set equalizer. Therefore, heavily encrypted audio data can be playable in a portable device with relatively low computing power and, by setting equalizer mode suitable to a music genre, the audio data can be conveyed to a listener authentically.

Abstract: A method of converting audio data encrypted for anti-piracy and copyright protection to a suitable format so that the data can be played in a portable device. A computer first decrypts the encrypted audio data and inserts information for setting equalizer, then encrypts the audio data lightly with the information for setting equalizer and transmits the data to a portable device. The portable device sets equalizer suitable to the lightly-encrypted audio data using the information for setting equalizer inserted by the computer, then decrypts the lightly-encrypted audio data, and outputs the decrypted audio data while amplifying or attenuating audio data for each band according to the set equalizer. Therefore, heavily encrypted audio data can be playable in a portable device with relatively low computing power and, by setting equalizer mode suitable to a music genre, the audio data can be conveyed to a listener authentically.