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: A method for transferring audio data and audio-related information includes: a generation step of generating second audio data from first audio data; a transmission step of transmitting the second audio data and audio-related information associated with the second audio data; and a reception step of receiving the second audio data and the audio-related information, wherein the audio-related information includes information representing a sampling frequency of the first audio data.

Abstract: The present invention is relative to a video signal transmitting/receiving system in which digital video signals are transmitted from a transmitter (30) to a receiver (50) using a line (9) as a transmission channel. The transmitter (30) converts the video signals to be transmitted to a bit string longer in data length than a pixel making up the video signals, allocates a plural number of the bit strings to a blanking period during which pixel data in the pixel string is not transmitted and, using these bit strings, transmits the same superposed data a plural number of times. The receiver (50) extracts the specified bit strings indicating the blanking period from the received data and performs majority processing on the results of demodulation of the extracted bit strings to decide on output data. This reduces errors in reception of supplementary data to simplify the circuit structure as well as to ameliorate the error rate.

Abstract: A method for transferring audio data and audio-related information includes generating second audio data from first audio data, transmitting second audio data and audio-related information associated with the second audio data, and receiving the second audio data and audio-related information which includes information on a sampling frequency of the first audio data.

Abstract: A sound image localization apparatus comprises a signal source for outputting an audio signal; a localization angle input unit for receiving an angle of a sound image to be localized; a coefficient control unit for receiving sound image localization angle information from the localization angle input unit, reading coefficients from a coefficient memory in accordance with the information, and outputting the coefficients; first, second, and third multipliers for multiplying the audio signal output from the signal source by using first, second, and third coefficients output from the coefficient control means, respectively; a first signal processing unit for receiving the output from the second multiplier, and processing it by using a filter having a predetermined first frequency response; a second signal processing unit for receiving the output from the second multiplier, and processing it by using a filter having a predetermined second frequency response; a first adder for adding the output from the first multi

Abstract: There is provided a recording medium reproducing apparatus in which a digital signal immediately before being inputted to a D/A converting LSI is prevented from being taken out and unfairly copied A digital signal processing LSI and the D/A converting LSI are connected to each other through an external bus. A scrambling processing circuit for scrambling a digital signal outputted from a digital signal processing circuit is provided inside the digital signal processing LSI. A descrambling processing circuit for descrambling the scrambled digital signal transmitted through the external bus is provided inside the D/A converting LSI.

Abstract: There is provided a DVD-audio reproducing apparatus in which a digital signal immediately before being inputted to a D/A converting LSI is prevented from being taken out and unfairly copied. A digital signal processing LSI and the D/A converting LSI are connected to each other through an external bus. A scrambling processing circuit for scrambling a digital signal outputted from a digital signal processing circuit is provided inside the digital signal processing LSI. A descrambling processing circuit for descrambling the scrambled digital signal transmitted through the external bus is provided inside the D/A converting LSI.

Abstract: An audio decoding device for decoding audio information with multiple channels includes a coded information memory section for storing the coded audio information; an information transmission section for reading the coded audio information stored at an arbitrary position in the coded information memory section; and an audio decoding section for decoding the coded audio information read by the information transmission section and outputting the resultant audio information in accordance with a time axis, wherein the information transmission section includes a buffer memory for retaining an address of an actual pointer for reading the coded audio information in the coded information memory section so as not to be reread, an address of a temporary pointer for reading the coded audio information in the coded information memory section so as to be reread, actual pointer data read by the actual pointer, and temporary pointer data read by the temporary pointer.

Abstract: An audio information provision system for providing a target with an audio information stream suitable to the target includes a database for storing a plurality of audio information streams; an inherent condition input section for receiving an inherent condition of the target; a variable condition input section for receiving a variable condition varying in accordance with time; a selection section for selecting at least one audio information stream from the plurality of audio information streams based on at least the inherent condition and the variable condition; and an output section for outputting the at least one audio information stream.

Abstract: A signal processing apparatus includes a decoder for decoding a stream signal so as to generate a digital audio signal of a low frequency effect channel and digital audio signals of first through n'th (n≧2) channels; an adder section for adding the digital audio signal of the low frequency effect channel and the digital audio signal of a specified channel among the first through n'th channels, so as to generate an addition signal; an n number of D/A conversion sections for converting the digital audio signals of the first through n'th channels, excluding the digital audio signal of the specified channel, and the addition signal into n types of analog audio signals; a first signal processing section for generating a digital audio signal of the low frequency effect channel; and a second signal processing section for generating an analog audio signal of the specified channel.

Abstract: A reproduction apparatus includes a read section for reading a first data unit from a recording medium having the first data unit recorded thereon; a communication section for receiving a second data unit in accordance with a communication condition with a server; a synthesis section for, when the communication section cannot receive the second data unit in accordance with the communication condition, outputting the first data unit as a first output data unit, and when the communication section can receive the second data unit in accordance with the communication condition, synthesizing the first data unit and the second data unit so as to generate a synthesis data unit and outputting the synthesis data unit as a second output data unit; and a reproduction section for reproducing the first output data unit and the second output data unit.

Abstract: In an audio encoder, a filter bank 3 converts sample data on a time domain divided in an audio signal input section 2 to spectral data on a frequency domain. A quantization section 4 quantizes and codes the spectral data on the frequency domain, and a bitstream multiplexer 6 outputs an audio codec stream. At this point, a quantization controller 5 compares quantization information to which an offset value has been added with the one to which an offset value has not been added, and the quantization section codes quantization information having a shorter code length. An audio decoder 7 decodes the audio codec stream generated in the audio encoder 1.

Abstract: A reproduction apparatus according to the present invention includes: a signal input section for receiving an input signal having an input signal type; a synchronization signal detection section for detecting a predetermined synchronization signal in the input signal and determining the input signal type in accordance with an occurrence frequency with which an interval repeatedly occurs between adjacent instances of the predetermined synchronization signal; and a signal processing section for subjecting the input signal to a signal processing which is suitable for the determined input signal type.

Abstract: A reproduction apparatus according to the present invention includes: a signal input section for receiving an input signal having an input signal type; a synchronization signal detection section for detecting a predetermined synchronization signal in the input signal and determining the input signal type in accordance with an occurrence frequency with which an interval repeatedly occurs between adjacent instances of the predetermined synchronization signal; and a signal processing section for subjecting the input signal to a signal processing which is suitable for the determined input signal type.

Abstract: A device of the present invention is an exponential calculation device for calculating x{circumflex over ( )}(a/b) (where a and b are each an integer constant) for a given input value of x. The device includes: an input control section for outputting a value of x′, wherein x′=x when x≦A (where A is a threshold value within a variable range of x) and x′=x/2{circumflex over ( )}b when x>A; a core section for outputting a value of z′=x′{circumflex over ( )}(a/b); and an output control section for outputting a value of z, wherein z=z′ when x≦A and z=z′*2{circumflex over ( )}a when x>A.

Abstract: A coding device includes: a decoder for decoding a first stream signal in which a first video stream including a first video stream information generated by coding a first video signal and a first audio stream including a first audio stream information generated by coding a first audio signal are multiplexed; and a re-encoder for generating, based on the decoded first stream signal, a second video stream including a second video stream information having a bit rate lower than the first video stream information and a second audio stream including a second audio stream information having a bit rate lower than the first audio stream information, and multiplexing the second video stream is and the second audio stream to generate a second stream signal.

Abstract: An audio decoding apparatus is provided for receiving a bit stream on a block-by-block basis, decoding one block of the bit stream to form decoded audio data for a plurality of channels, and storing the decoded audio data for each of the plurality of channels in a memory device, thereby down-mixing the decoded audio data for each of the plurality of channels. The audio decoding apparatus includes an operation section for down-mixing the decoded audio data for each of the plurality of channels corresponding to a first block of the bit stream in the memory section while a second block of the bit stream is decoded.

Abstract: A device of the present invention is an exponential calculation device for calculating x−(a/b) (where a and b are each an integer constant) for a given input value of x. The device includes: an input control section for outputting a value of x′, wherein x′=x when x≦A (where A is a threshold value within a variable range of x) and x′=x/2ˆ b when x>A: a core section for outputting a value of z′=x′ (a/b); and an output control section for outputting a value of z, wherein z=z′ when x≧A and z=z′*2 a when x>A.

Abstract: A sound image localization device which includes a signal source for outputting an audio signal, a signal divider for dividing the audio signal output from the signal source into two digital audio signals respectively for two channels, and a first signal processor for receiving one of the two digital signals and processing the digital signal so as to localize a virtual sound image using a filter having a first frequency characteristic. In addition, the sound image localization device includes a first D/A converter for converting the digital signal output from the first signal processor into an analog signal, a second D/A converter for receiving the other digital signal obtained from the signal divider and converting the signal into an analog signal, a first control speaker for outputting the audio signal obtained by the first D/A converter to a prescribed space area; and a second control speaker for outputting the audio signal obtained by the second D/A converter to a prescribed space area.

Abstract: A distribution system includes a distribution server device, an acquisition device, and an audio reproduction device, and distributes a program for decoding encoded audio data. The distribution server device sends the program for decoding the encoded audio data. The acquisition device is connected to the distribution server device via a network, and acquires the program and stores it in a removable memory unit. The audio reproduction device decodes the encoded audio data using the program stored in the removable memory unit, and outputs sounds.