Abstract: The present technology relates to a signal processing device, a signal processing method, and a program for enabling reproduction of high-quality sounds with a low process load. The signal processing device includes a demultiplexing section that extracts encoded audio signals and overamplitude flags, which have been generated for a plurality of respective panel loudspeakers and each indicate whether overamplitude will occur in the corresponding panel loudspeaker, by demultiplexing encoded data, a decoding section that decodes the encoded audio signals, and an adjustment section that adjusts audio signals to be supplied to the plurality of panel loudspeakers on the basis of the overamplitude flags and audio signals resulting from the decoding. The present technology is applicable to an encoding device and a decoding device.

Abstract: The present technique relates to a signal processing device and a learning device capable of improving playback quality. The signal processing device generates a packet by packetizing encoded data encoded in monaural and separated for channels; transmits, by wireless communication, the packet generated; and controls a number of retransmissions of the packet and a bitrate in accordance with a fluctuation value of a first parameter for estimating a radio wave state, the first parameter being obtained from a receiving device. The present technique can be applied in an audio playback system that plays back audio data.

Abstract: The present technology relates to a signal processing apparatus, an encoding method, and a signal processing system that allow reproduction quality to be improved. A signal processing apparatus receives packets that are separated for respective channels and each additionally include identification information, stores the packets in a buffer in reference to the identification information, and decodes those of the packets which are directed to the signal processing apparatus. The present technology can be applied to an audio reproduction system that reproduces audio data for two channels.

Abstract: A decoding apparatus according to an embodiment of the present technology includes: a reception unit; a first storage unit; a second storage unit; and a decoding unit. The reception unit receives a plurality of pieces of encoded data generated by encoding a plurality of pieces of frame data to be wirelessly transmitted, identification information being assigned to each of the plurality of pieces of frame data. The first storage unit stores each of the received plurality of pieces of encoded data in a predetermined storage area. The second storage unit stores, on a basis of the identification information corresponding to each of the plurality of pieces of encoded data, an address of the storage area of the first storage unit in which each of the plurality of pieces of encoded data is stored. The decoding unit reads the encoded data from the first storage unit on a basis of the address stored in the second storage unit on a basis of the identification information, and decodes the read encoded data.

Abstract: The present technology relates to a sound output control apparatus and a sound output control method that perform control to prevent a balance of a system from being disturbed when reproduction is performed using a plurality of wireless speakers. A sound output control apparatus includes a transmitter that transmits first setting information regarding a sound output of the sound output control apparatus, a receiver that receives second setting information regarding a sound output of another sound output control apparatus, and a controller that controls a sound pressure or a reproduction frequency range in which reproduction is performed, on the basis of the first setting information or the second setting information. The first setting information and the second setting information each include at least information regarding a temperature, information regarding an amplitude, information regarding a remaining capacity of a power supply, and/or information regarding the reproduction frequency range.

Abstract: The present technology relates to a signal processing device, a signal processing method, and a program for enabling reproduction of high-quality sounds with a low process load. The signal processing device includes a demultiplexing section that extracts encoded audio signals and overamplitude flags, which have been generated for a plurality of respective panel loudspeakers and each indicate whether overamplitude will occur in the corresponding panel loudspeaker, by demultiplexing encoded data, a decoding section that decodes the encoded audio signals, and an adjustment section that adjusts audio signals to be supplied to the plurality of panel loudspeakers on the basis of the overamplitude flags and audio signals resulting from the decoding. The present technology is applicable to an encoding device and a decoding device.

Abstract: The present technology relates to an audio output controller, an audio output control method, and a program that can improve sound quality. An audio output controller includes multiple speaker units installed so as to face different directions, outputs measurement sound from at least one speaker unit of the multiple speaker units, and controls a gain of the speaker unit on the basis of a reverberation characteristic when the measurement sound is measured by a microphone in a predetermined position. Measurement sound output from a speaker unit installed in another audio output controller is measured by the microphone. Alternatively, measurement sound output from an installed speaker unit is measured by the microphone. The present technology can be applied to a wireless speakers, for example.

Abstract: The present technology relates to an audio output controller, an audio output control method, and a program that can improve sound quality. An audio output controller includes multiple speaker units installed so as to face different directions, outputs measurement sound from at least one speaker unit of the multiple speaker units, and controls a gain of the speaker unit on the basis of a reverberation characteristic when the measurement sound is measured by a microphone in a predetermined position. Measurement sound output from a speaker unit installed in another audio output controller is measured by the microphone. Alternatively, measurement sound output from an installed speaker unit is measured by the microphone. The present technology can be applied to a wireless speakers, for example.

Abstract: The present technology relates to a sound output control apparatus, a sound output control method, and a program that make it possible to perform control to prevent a balance of a system from being disturbed when reproduction is performed using a plurality of wireless speakers. A sound output control apparatus includes a transmitter that transmits first setting information regarding a sound output of the sound output control apparatus; a receiver that receives second setting information regarding a sound output of another sound output control apparatus; and a controller that controls a sound pressure or a reproduction frequency range in which reproduction is performed, on the basis of the first setting information or the second setting information.

Abstract: The present technology relates to an encoder and an encoding method, a decoder and a decoding method, and a program by which encoding efficiency is able to be improved by constraining an appearance probability of a predetermined quantization value of an encoding target to 0 when encoding with a combination of Huffman encoding and multidimensional encoding is performed.

Abstract: The present technology relates to an encoder and an encoding method, a decoder and a decoding method, and a program by which encoding efficiency is able to be improved by constraining an appearance probability of a predetermined quantization value of an encoding target to 0 when encoding with a combination of Huffman encoding and multidimensional encoding is performed.

Abstract: The present technology relates to an encoder and an encoding method, a decoder and a decoding method, and a program by which encoding efficiency is able to be improved by constraining an appearance probability of a predetermined quantization value of an encoding target to 0 when encoding with a combination of Huffman encoding and multidimensional encoding is performed.

Abstract: The present technology relates to an encoder and an encoding method, a decoder and a decoding method, and a program by which encoding efficiency is able to be improved by constraining an appearance probability of a predetermined quantization value of an encoding target to 0 when encoding with a combination of Huffman encoding and multidimensional encoding is performed.

Abstract: The present technology relates to an encoder and an encoding method, a decoder and a decoding method, and a program by which encoding efficiency is able to be improved by constraining an appearance probability of a predetermined quantization value of an encoding target to 0 when encoding with a combination of Huffman encoding and multidimensional encoding is performed.

Abstract: There is provided an audio encoder comprising a determination part determining, based on frequency spectra of audio signals of a plurality of channels, a mixing ratio as a ratio, relative to a frequency spectrum after mixing for each channel of the plurality of channels, of the frequency spectrum for another channel, a mixing part mixing the frequency spectra of the plurality of channels for each channel based on the mixing ratio determined by the determination part, and an encoding part encoding the frequency spectra of the plurality of channels after mixing by the mixing part.

Abstract: There is provided an audio coding device including a first windowing part that multiplies an audio signal by a first window function, a second windowing part that multiplies the audio signal by a second window function having a characteristic different from a characteristic of the first window function, a window selecting part that selects the first window function or the second window function as an optimum window function based on the audio signal multiplied by the first windowing part and the audio signal multiplied by the second windowing part, a coding part that codes a frequency spectrum of the audio signal multiplied by the optimum window function, and a transmitting part that transmits the frequency spectrum coded by the coding part and window function information representing the optimum window function.

Abstract: The present technique relates to a decoding apparatus and method, an audio signal processing apparatus and method, and a program that enable generation of an interpolation signal with less incongruity through a smaller amount of calculation. A frame signal decoding unit generates a decoded signal by decoding frame data, and an interpolation state determining unit determines an interpolation status for specifying the pattern of the process to be performed to obtain an output signal based on an error flag. A similar signal detecting unit extracts part of a thinned signal obtained by thinning a past output signal. An upsampling unit upsamples the extracted thinning signal, and a smoothing unit generates an interpolation signal by performing a smoothing process on the upsampled thinned signal.

Abstract: The present invention relates to a speech processing apparatus, a speech processing method and a program which, when multichannel audio signals are downmixed and coded, prevent delay and an increase in the computation amount upon decoding of the audio signals. An inverse multiplexing unit (101) acquires coded data on which a BC parameter is multiplexed. An uncorrelated frequency-time transform unit (102) performs IMDCT transform and IMDST transform of frequency spectrum coefficients of a monaural signal (XM) obtained from this coded data to generate the monaural signal XM) which is a time domain signal and a signal (XD?) which is substantially uncorrelated with this monaural signal (XM). The stereo synthesis unit (103) generates a stereo signal by synthesizing the monaural signal (XM) and the signal (XD?) using the BC parameter. The present invention is applicable to, for example, a speech processing apparatus which decodes a downmixed and coded stereo signal.

Abstract: A decoding device includes an acquisition unit configured to acquire a first frequency signal including a narrowband signal and a wideband signal, a direct inverse orthogonal transform unit configured to perform a direct matrix operation with respect to the narrowband signal of the first frequency signal so as to perform inverse orthogonal transform, and a high-speed inverse orthogonal transform unit configured to perform inverse orthogonal transform employing a high-speed operation method with respect to the wideband signal of the first frequency signal.

Abstract: The present invention relates to a decoding apparatus, a decoding method, an encoding apparatus, an encoding method, and programs that can shorten the delay time caused by the band extension at the time of decoding, and restrain increases in resources on the decoding side. A higher frequency component generating unit (73) generates a pseudo higher frequency spectrum by using a lower frequency spectrum (SP-L) and a higher frequency envelope (ENV-H). A phase randomizing unit (74) randomizes the phase of the pseudo higher frequency spectrum, based on a random flag (RND). An inverse MDCT unit (75) denormalizes the lower frequency spectrum (SP-L) by using a lower frequency envelope (ENV-L), and combines the pseudo higher frequency spectrum supplied from the phase randomizing unit (74) with the denormalized lower frequency spectrum (SP-L). The combination result is used as the spectrum of the entire band.