Abstract: A system and method are provided for decoding an audio signal. In one embodiment, a first pulse is identified with a predetermined relative duration with respect to a second pulse. A sampling frequency is then calculated based on such identification. In another embodiment, an audio signal is decoded utilizing a threshold. In still yet another embodiment, a decoder is provided for decoding an audio signal utilizing a clock that is independent of the audio signal.

Abstract: A receiver for use in a system for transmission from a transmitter to a receiver, the receiver includes a first frequency divider for outputting a first signal by dividing a signal with a frequency corresponding to a pixel clock or an integral multiple thereof by a reciprocal of an integral multiple of a first natural number, the integral multiple of the first natural number being greater than or equal to 1; and a cycle control portion for outputting a second signal having first and second cycles included within a cycle of the first signal by controlling a cycle of the pixel clock.

Abstract: A method and apparatus for automatic audio standard detection in terrestrial broadcast signals is disclosed. In one embodiment, a method of detecting automatic audio standard for terrestrial broadcast includes scanning for each known audio frequency standard of interest in a current band energy spectrum in an incoming broadcast signal using a standard of non standard energy estimation algorithm, such as Goertzel DFT or FFT based algorithm for a predetermined time interval. At each known audio frequency standard of interest, energy is computed using the associated standard or non standard energy estimation algorithm within the predetermined time interval. The computed energy at each known audio frequency standard of interest is then compared to predetermined threshold energy. At each known audio frequency standard of interest, it is determined whether the audio frequency standard of interest is detected based on the outcome of the comparison.

Abstract: An audio processing device may estimate noise effects at a particular location based on noise measurement data corresponding to one or more noise sources. The audio processing device may modify one or more output audio content transmitted by the audio processing device to that particular location such that the modification may cancel the estimated noise effects at the particular location, at time when the output audio streams are received at that location. The noise effects estimation may also be based on audio reception measurement data at the particular location. The noise measurement data and/or the audio reception measurement data may be generated by audio capturing devices placed at or near noise sources, and/or at or near the particular location, respectively. The noise measurement data and/or the audio reception measurement data may be communicated to the audio processing device using wired and/or wireless connections.

Abstract: The identification information processing unit receives identification information identifying the reception device from a reception device, and generates decoded identification information indicating the decoded value of the received identification information. The parameter value selection unit selects the first parameter value when the decoded identification information includes an information representing a television, selects a second parameter value that is less than the first parameter value when the decoded identification information includes an information representing an audio device, and generates a selected parameter value. The frequency divider frequency divides the audio clock using the selected parameter value, and generates a frequency division signal. The counter counts one period of the frequency division signal using the pixel clock and generates the cycle time stamp. The transmission device then sends the selected parameter value and cycle time stamp to the reception device.

Abstract: An audio processing system which allows a surround sound system to utilize the transmission bandwidth efficiently by adaptively transmitting a supplementary data from a secondary source in addition to the audio signals of a primary source. The system consists of a transmitter component, capable of transmitting audio signals from a primary source and adaptively inserts supplementary data of the secondary source in the reserved communication bandwidth. The transmitter inserts headers in the channels used by the supplementary data to allow the receivers to identify the channel allocation between the primary source and the secondary source. Another part of the audio processing system is that of a receiver component which is capable of discriminating between data from the primary source and data from the secondary source.

Abstract: An information processing apparatus includes the following elements. A generation unit generates a multiplexed video frame having a predetermined screen size. A dividing unit divides input audio data into audio data items each having samples for one frame period of the multiplexed video frame. A multiplexing unit multiplexes audio data items obtained by dividing each stream of input audio data and number-of-samples information representing the number of samples thereof. A processing unit processes audio data items multiplexed in a multiplexed video frame input from an input video port, and outputs from an output video port thereof a multiplexed video frame in which the resulting audio data items and the number-of-samples information thereof are multiplexed. An extraction unit extracts the audio data items multiplexed in the multiplexed video frame output from the processing unit in accordance with the number-of-samples information. A transmission unit outputs the extracted audio data items to outside.

Abstract: A method and apparatus for synchronizing audio and video portions of a media program signal is disclosed. In a transmitting embodiment, the method comprises the steps of identifying a video event according to an video event discriminant in the video signal, and inserting a timing signal into the audio signal, and the apparatus comprises a video analysis module for identifying a video event according to an video event discriminant in the video signal, a timing signal generator for generating a timing signal, and a mixer for inserting the timing signal into the audio signal.

Abstract: A television audio signal encoder includes an up-sampler that inserts additional samples into a sum signal, a difference signal, and/or a secondary audio program signal to increase the sample rate of the corresponding signal or signals. The sum signal represents the sum of a left channel digital audio signal and a right channel digital audio signal and the difference signal represents the difference between the left and right audio signals.

Abstract: A television audio signal encoder includes a device that sums a left channel audio signal and a right channel audio signal to produce a sum signal. The device also subtracts one of the left and right audio signals from the other to produce a difference signal. The encoder also includes a configurable infinite impulse response digital filter that selectively uses one or more sets of filter coefficients to filter the difference signal. The set of filter coefficients is applied to the difference signal by a single multiplier in a recursive manner to prepare the difference signal for transmission.

Abstract: In a signal transmitter and a signal receiver, a multiplexing part multiplexes a video signal and a time-base-compressed audio signal on the basis of a multiplexing control signal to transmit the multiplexed signal through a data line in the signal transmitter. Further, a demultiplexing part demultiplexes a video/audio multiplexed signal received through the data line into the original video signal and audio signal by a demultiplexing control signal in the signal receiver. According to the so-configured signal transmitter and signal receiver, it is possible to realize a signal transmission system compliant with the DVI standard, in which the audio signal as well as the video signal can be transmitted.

Abstract: A digital audio encoder, digital video conditioner, and a digital modulator are described for producing a television broadcast signal at a desired channel frequency range. Left and right audio channel signals are digitized and encoded according to a stereo standard and then combined to form a stereo audio signal. A second audio programming channel signal may be included. A video input can be digitized and conditioned to form a digital video channel. The stereo audio signal can be placed directly at a desired channel frequency by frequency modulation without the need for using an intermediate frequency. The digital video channel can be placed at a desired frequency by amplitude modulation. The digital and audio channels can be digitally combined to create a television transmission signal at a desired frequency and according to a desired standard.

Abstract: A television audio signal encoder includes a matrix that sums a left channel audio signal and a right channel audio signal to produce a sum signal. The matrix also subtracts one of the left and right audio signals from the other to produce a difference signal. The encoder also includes a configurable infinite impulse response digital filter that selectively uses one or more sets of filter coefficients to filter the difference signal. Each selectable set of filter coefficients is associated with a unique filtering application to prepare the difference signal for transmission.

Abstract: A television audio signal encoder includes a device that sums a left channel audio signal and a right channel audio signal to produce a sum signal. The device also subtracts one of the left and right audio signals from the other to produce a difference signal. The encoder also includes a configurable infinite impulse response digital filter that selectively uses one or more sets of filter coefficients to filter the difference signal. The set of filter coefficients is applied to the difference signal by a single multiplier in a recursive manner to prepare the difference signal for transmission.

Abstract: An integrated digital BTSC encoder with an improved pilot signal generator substantially implemented on a single CMOS integrated circuit. By digitally generating a sinusoid that is frequency locked to a two-state input reference signal using a high rate internal clock, a hardware-efficient BTSC pilot signal generator is provided with good acquisition and tracking performance. Implemented efficiently as a simple phase detector, a low-complexity loop filter, a pilot frequency offset adder, a phase accumulator and a sinusoidal generator, the invention enables lower-rate post-processing of the pilot tone without a costly variable interpolator decimator structures.

Abstract: A digital audio encoder, digital video conditioner, and a digital modulator are described for producing a television broadcast signal at a desired channel frequency range. Left and right audio channel signals are digitized and encoded according to a stereo standard and then combined to form a stereo audio signal. A second audio programming channel signal may be included. A video input can be digitized and conditioned to form a digital video channel. The stereo audio signal can be placed directly at a desired channel frequency by frequency modulation without the need for using an intermediate frequency. The digital video channel can be placed at a desired frequency by amplitude modulation. The digital and audio channels can be digitally combined to create a television transmission signal at a desired frequency and according to a desired standard.

Abstract: According to one embodiment, a video/audio output method according to one embodiment includes detecting a playback volume value set in an external speaker controller for controlling an external speaker, calculating a decibel value corresponding to the detected playback volume value, generating an audio signal corresponding to the calculated decibel value, and outputting the generated audio signal to the external speaker controller, and, at the same time, outputting a video based on a video signal corresponding to the audio signal.

Abstract: Digital audio data which have a predetermined packet structure are divided into units including a predetermined number of bits; each unit of the divided digital audio data is converted into specific data to be encoded; the encoded data are arranged in blanking intervals of video data; the digital audio data are transmitted as well as the video data using a transmission line for the video data, and the video data and the audio data may be simultaneously and favorably transmitted, adopting an existing video-data transmission format such as the DVI standard.

Abstract: This invention relates to a method and system for modeling film grain noise. The film grain noise as modeled is applied to a video signal. Both the signal-dependent aspect 430 and the correlation aspect 440 of the film grain noise are taken into consideration, resulting in a more realistic modeling of film grain noise. Furthermore, the efficiency and the flexibility for modeling film grain noise are improved by use of the method and system according to this invention.

Abstract: A coding/decoding part performs codes and decodes a given signal in one of a plurality of coding/decoding modes of different bit rates; and a control part sets a predetermined bit rate to be applied by the coding/decoding part in case a given signal is output after being coded and decoded by said coding/decoding part without storage thereof in a predetermined recording medium.

Abstract: Disclosed herein is a Radio Frequency (RF) modulator. The RF modulator includes a Chrominance-to-Luminance (C/L) delay compensation unit for receiving a video signal and compensating for a time delay between the chrominance and luminance signals of the video signal, and a modulation unit for receiving the video signal, which is compensated for by the C/L delay compensation unit, and an audio signal and converting the video and audio signal into a preset frequency-band RE signal. The C/L delay compensation unit and the modulation unit are packaged in a single package.

Abstract: A television audio signal encoder includes an up-sampler that inserts additional samples into a sum signal, a difference signal, and/or a secondary audio program signal to increase the sample rate of the corresponding signal or signals. The sum signal represents the sum of a left channel digital audio signal and a right channel digital audio signal and the difference signal represents the difference between the left and right audio signals.

Abstract: A CEC on the fly modification function, operated by a manipulating switch including at least one HDMI-CEC input port and at least two HDMI-CEC output ports, enables the manipulating switch to receive a CEC block which was initiated by a certain device, modify one or more bits in the received CEC block, optionally on the fly, and supply the modified CEC block to one or more devices.

Abstract: A method and apparatus for measuring and/or correcting audio/visual synchronization is disclosed. In one embodiment, a method for providing synchronization of a video signal and a corresponding audio signal associated with the audio/visual transmission includes detecting a triggering video event in the video signal and inserting a synchronization signal into the audio signal, where the synchronization signal is correlated to the triggering video event. In another embodiment, a method for measuring and optionally correcting the synchronization of the video signal and the audio signal includes detecting the triggering video event in the video signal, detecting the synchronization signal in the audio signal, and assessing the synchronization of the video signal and the audio signal in accordance with a time offset between the triggering video event and the synchronization signal.

Abstract: An audio/video data recording/reproducing device is provided that allows all video and audio signals, which can be displayed by a display of the audio/video data recording/reproducing device proper, to be output to an exterior through a digital interface. Such audio/video signals are in the forms of, for example, files as recorded including a moving picture file, a still picture file, and a file resulting from synthesization of a moving picture file with a still picture file. When the digital interface of the recording/reproducing device is connected to a digital TV, a synthesized signal from a synthesizing part 117, after being encoded into an MPEG-TS in an encoder 103, is output from a 1394 interface part 121. When the digital interface is connected to another editor or recording device, a recording signal from a reproducing part 116 is output as it is from the 1394 interface part 121.

Abstract: A communication system including a transmitter, a receiver, and a TMDS-like link, in which video data and auxiliary data (typically including timing data associated with other auxiliary data) are transmitted from the transmitter to the receiver, or in which video data are transmitted over the link from the transmitter to the receiver, and auxiliary data (typically including timing data associated with other auxiliary data) are transmitted from the receiver to the transmitter. In typical embodiments the auxiliary data include one or more streams of audio data.

Abstract: An audio signal supplying device includes a connection terminal which is connected to a speaker unit and which outputs an audio signal to the speaker unit, a specifying section which specifies a type of the speaker unit connected to the connection terminal, an acquiring section which acquires a parameter corresponding to the type of the speaker unit specified by the specifying section from an outside, a storing section which stores the parameter acquired by the acquiring section, an inputting section into which the audio signal is input, an acoustic characteristic controlling section which adjusts an acoustic characteristic of the audio signal input into the inputting section based on the parameter stored in the storing section, and a supplying section which supplies the audio signal whose acoustic characteristic is adjusted by the acoustic characteristic controlling section to the connection terminal.

Abstract: A television audio signal encoder includes a matrix that sums a left channel audio signal and a right channel audio signal to produce a sum signal. The matrix also subtracts one of the left and right audio signals from the other to produce a difference signal. The encoder also includes a configurable infinite impulse response digital filter that selectively uses one or more sets of filter coefficients to filter the difference signal. Each selectable set of filter coefficients is associated with a unique filtering application to prepare the difference signal for transmission.

Abstract: A method and apparatus for utilizing a coded audio/video signal to conduct commerce over the Internet. Broadcast information is broadcast from a remote location on a secondary network containing video over the secondary network to a location thereon proximate the location of the user PC. Unique information is encoded in the broadcast information representative of a location on the primary network of the remote node. The broadcast information is received and displayed on a video display at the location on the secondary network proximate the user PC. The user PC is connected to the remote node utilizing the unique information, and in accordance thereto, in response to receiving the unique information encoded within the broadcast information broadcast over the secondary network.

Abstract: An BTSC encoder with an improved digital filter structure substantially implemented on a single CMOS integrated circuit is described. By cascading first and second order allpass filter structures to form a higher order digital filter, such as a Cauer low pass filter, limit cycle oscillations are reduced or eliminated, word-length growth from one stage to the next is contained, and a more efficient overall filter structure and performance is obtained.

Abstract: The identification information processing unit receives identification information identifying the reception device from a reception device, and generates decoded identification information indicating the decoded value of the received identification information. The parameter value selection unit selects the first parameter value when the decoded identification information includes an information representing a television, selects a second parameter value that is less than the first parameter value when the decoded identification information includes an information representing an audio device, and generates a selected parameter value. The frequency divider frequency divides the audio clock using the selected parameter value, and generates a frequency division signal. The counter counts one period of the frequency division signal using the pixel clock and generates the cycle time stamp. The transmission device then sends the selected parameter value and cycle time stamp to the reception device.

Abstract: A method and apparatus for automatic audio standard detection in terrestrial broadcast signals is disclosed. In one embodiment, a method of detecting automatic audio standard for terrestrial broadcast includes scanning for each known audio frequency standard of interest in a current band energy spectrum in an incoming broadcast signal using a standard of non standard energy estimation algorithm, such as Goertzel DFT or FFT based algorithm for a predetermined time interval. At each known audio frequency standard of interest, energy is computed using the associated standard or non standard energy estimation algorithm within the predetermined time interval. The computed energy at each known audio frequency standard of interest is then compared to predetermined threshold energy. At each known audio frequency standard of interest, it is determined whether the audio frequency standard of interest is detected based on the outcome of the comparison.

Abstract: A system and method for demodulating signals are disclosed. In a particular embodiment, the method includes receiving a signal at an input and determining a first noise estimate of the signal. The method also includes providing a first output indicating a second noise estimate of the signal at a primary carrier frequency and providing a second output indicating a third noise estimate of the signal at a secondary carrier frequency.

Abstract: An integrated digital BTSC encoder with an improved pilot signal generator substantially implemented on a single CMOS integrated circuit is described. By digitally generating a sinusoid that is frequency locked to a two-state input reference signal using a high rate internal clock, a hardware-efficient BTSC pilot signal generator is provided with good acquisition and tracking performance. Implemented efficiently as a simple phase detector, a low-complexity loop filter, a pilot frequency offset adder, a phase accumulator and a sinusoidal generator, the invention enables lower-rate post-processing of the pilot tone without a costly variable interpolator decimator structures.

Abstract: A packet generating method in a wireless High Definition Multimedia Interface (HDMI) environment includes generating a packet which includes either AV data or control data in a payload and a field indicative of a packet type in a header according to a HDMI environment; and transmitting the generated packet. Accordingly, the AV data and the control data can be transceived over the single channel in the HDMI.

Abstract: In a signal transmitter and a signal receiver, a multiplexing part multiplexes a video signal and a time-base-compressed audio signal on the basis of a multiplexing control signal to transmit the multiplexed signal through a data line in the signal transmitter, and a demultiplexing part demultiplexes a video/audio multiplexed signal received through the data line into the original video signal and audio signal by a demultiplexing control signal in the signal receiver. According to the so-configured signal transmitter and signal receiver, it is possible to realize a signal transmission system compliant with the DVI standard, in which the audio signal as well as the video signal can be transmitted.

Abstract: In a signal transmitter and a signal receiver, a multiplexing part multiplexes a video signal and a time-base-compressed audio signal on the basis of a multiplexing control signal to transmit the multiplexed signal through a data line in the signal transmitter, and a demultiplexing part demultiplexes a video/audio multiplexed signal received through the data line into the original video signal and audio signal by a demultiplexing control signal in the signal receiver. According to the so-configured signal transmitter and signal receiver, it is possible to realize a signal transmission system compliant with the DVI standard, in which the audio signal as well as the video signal can be transmitted.

Abstract: A method for detecting a program deviation period during a television broadcast having a main audio program and a secondary audio program includes: receiving the main audio program; receiving the secondary audio program; calculating a similarity value between the main audio program and the secondary audio program within a candidate period; and determining whether the candidate period is the program deviation period according to the calculated similarity value.

Abstract: Synchronous signal overlapping and outputting means and sound signal transmitting means of a signal transmitter transmit any color signal which synchronous signals overlapped and the other color signals, and a sound signal on which polarity information of the synchronous signals was added through four signal lines to a signal receiver, respectively. Synchronous signal recovering and outputting means of the signal receiver recovers the synchronous signals on the basis of the synchronous signals separated from the color signal with the polarity information and outputs the signals to an image output unit. Then, it is possible to output sounds together with images inputted from the image inputting source from the image outputting unit with only four signal lines.

Abstract: Digital audio data that have a predetermined packet structure are divided into units including a predetermined number of bits; each unit of the divided digital audio data is converted into specific data to be encoded; the encoded data are arranged in blanking intervals of video data; the digital audio data are transmitted along with the video data using a transmission line for the video data, and the video data and the audio data are simultaneously and favorably transmitted, adopting an existing video-data transmission format, such as the DVI standard.

Abstract: A remote control transmitter is provided with an AUDIO key for switching an audio mode in sound multiplex broadcasting and an ENTER key for determining various types of selections. When the ENTER key is operated in a state where the audio mode is temporarily selected by operating the AUDIO key, the state where the audio mode is temporarily selected is treated as the steady selection corresponding to setting on a menu screen.

Abstract: A language displaying apparatus for a digital TV and a method for the same notices all kinds of languages included in broadcasting signals and enables a user to recognize them and select the preferable language easily and accurately. To achieve this, the method according to the present invention comprises the steps of abstracting and storing all kinds of languages included in broadcasting signals, displaying the stored kinds of languages or outputting in the form of an audio and outputting the audio signals corresponding to the language selected by the user among the kinds of languages.

Abstract: A circuit for detecting a transition in the content of a digital video stream containing embedded audio samples and providing a smooth transition from an old audio stream embedded before the transition to a new audio stream embedded after the transition. The circuit detects the transistion and in response it fades out the old audio stream and fades in the new audio stream. During the transition, the old and new audio signal are buffered. The old stream is not faded out until only a number of audio samples required for the fading process remain in the associated buffer. The new audio stream is not faded in until a selected number of audio samples have been stored I the associated buffer. The selected number of samples is typically smaller than the number of samples that is desirably stored in the associated buffer during steady state operation. An interpolation operation is used to allow the number of new audio samples in the associated buffer to build up to the desired number.

Abstract: An audio control signal transmission apparatus and reception apparatus, an audio control signal based control system and control method, a program information transmission apparatus and transmission method, and a program reservation apparatus and program reservation method which can realize a control system in which a control signal is superimposed on an audio signal so as to be transmitted and to operate at a distance a reception apparatus capable of receiving the signal and an apparatus connected to the reception apparatus.

Abstract: Disclosed is a method and apparatus for transmission of audio signals over a dedicated video transmission line in which the analog audio signal is inserted into and becomes a part of the video signal. Samples of the audio signal are inserted into the active video line, either at the beginnings or endings, or both, of each active video line scan signal. A defined amount of the active video interval is reserved from the active video line, and is replaced with samples of the analog audio signal. An analog switch in the modulator of the invention toggles to pick up the samples of audio and place them at the designated location (either at the beginnings or at the ends) of each active video line scan signal. A corresponding switch in the demodulator of the invention toggles to retrieve the audio samples from the active video line scans for output to the user. Stereo and/or bi-directional audio signals can be transmitted by insertion into both the beginnings and the endings of the active video line scan signals.

Abstract: An arrangement including a terminal for outputting at least a pair of video and acoustic signals, and a display for receiving the signals from the terminal and displaying a corresponding image, utilizes (1) a terminal modem including a multiplexer for time division multiplexing video and acoustic signals, and an input/output driver circuit for outputting the multiplexed signal, and (2) a display modem including an input/output driver circuit for inputting the multiplexed signal output from the terminal, and a demultiplexer for demultiplexing the input multiplexed signal into corresponding video and acoustic signals. The display can be connected to an optional device, and the optional device is also controlled by the terminal.

Abstract: A method of adding auxiliary data, e.g., audio data, to a high-speed serial video link in such a way that it is invisible to existing receiver and such that auxiliary data, e.g., audio, can be transmitted without any knowledge of the capabilities of the display to receive the auxiliary data. Some of the DC balancing bits are used to transport the auxiliary data information over the link in a manner that does not change the data recovered by a DVI-CE receiver, or a legacy receiver (installed base). DC balancing is also maintained, but with differences over known techniques. Since the auxiliary data bits (which are occupying the time slots of the DC balance bits) will be interpreted by legacy receivers as DC balance bits, the data must be optionally inverted to remain consistent with the value of the auxiliary data bit being transmitted.

Abstract: The present invention has multiple AV/S terminals, an RF modulator, a S/AV signal converter and multiple switches. The switches connect the AV/S terminals with the RF outputs to allow the AV/S signal from the special AV/S terminal input into the RF modulator to be converted to an RF-signal input to the ANT terminal of the TV. Besides, the present invention further has an ANT input with an electronic switch and a detecting unit having a driver, which decides whether the electronic switch turns on. If the detecting unit detects no AV-signal or S-signal input from the AV/S terminals, the detecting unit first cuts off the power to the RF modulator and then makes the electronic switch turn on. The RF-signal from the ANT input is output to the RF output.

Abstract: Disclosed is a method and apparatus for transmission of audio signals over a dedicated video transmission line in which the analog audio signal is inserted into and becomes a part of the video signal. Samples of the audio signal are inserted into the active video line, either at the beginnings or endings, or both, of each active video line scan signal. A defined amount of the active video interval is reserved from the active video line, and is replaced with samples of the analog audio signal. An analog switch in the modulator of the invention toggles to pick up the samples of audio and place them at the designated location (either at the beginnings or at the ends) of each active video line scan signal. A corresponding switch in the demodulator of the invention toggles to retrieve the audio samples from the active video line scans for output to the user. Stereo and/or bi-directional audio signals can be transmitted by insertion into both the beginnings and the endings of the active video line scan signals.

Abstract: The invention is a data pipeline system which synchronizes the display of digitized audio and video data regardless of the speed at which the data was recorded on its linear medium. To do this, the video data is played at a constant speed, synchronized by the audio speed. Further, the invention uses a method of “staging” data in storage buffers, i.e., ring buffers, which encourages efficient use of the viewer module resources by not permitting the viewer to read excessive amounts of data at any one time, i.e., to read only enough data into any one ring buffer so that the amount of data in the ring buffer is roughly equivalent to the amount of data in the other ring buffers and yet permitting the viewer to read large enough chunks of data to promote efficient use of the fill system.