The present technique relates to an encoding device and a method, a decoding device and a method, and a program capable of obtaining higher quality audio. An encoding unit encodes position information and a gain of an object in a current frame in multiple encoding modes. A compressing unit generates, for each combination of encoding modes of each pieces of position information and gains, encoded meta data including encoding mode information indicating the encoding modes and encoded data which are the encoded position information and gains, and compresses the encoding mode information included in the encoding meta data. A determining unit selects encoded meta data of which amount of data is the least from among the encoded meta data generated for each combination, thus determining the encoding mode of each pieces of position information and gains. The present technique can be applied to an encoder and a decoder.

The present technique relates to an encoding device and a method, a decoding device and a method, and a program capable of obtaining higher quality audio. An encoding unit encodes position information and a gain of an object in a current frame in multiple encoding modes. A compressing unit generates, for each combination of encoding modes of each pieces of position information and gains, encoded meta data including encoding mode information indicating the encoding modes and encoded data which are the encoded position information and gains, and compresses the encoding mode information included in the encoding meta data. A determining unit selects encoded meta data of which amount of data is the least from among the encoded meta data generated for each combination, thus determining the encoding mode of each pieces of position information and gains. The present technique can be applied to an encoder and a decoder.

A device which produces the necessary directional audio signals for a 3-dimensional audio playback and which in that case uses as input signals the available channels of an audio recording intended for 2-dimensional audio playback. By taking psychoacoustic effects into account the desired spatial 3D audio effect is produced by a targeted use of signal delays, frequency-dependent amplitude matchings and a limited use of reverberation effects in conjunction with a targetedly asymmetric processing.

The present disclosure discloses a method and an apparatus for sound processing in a three-dimensional virtual scene. The method includes: acquiring, by a three-dimensional program engine, a sound processing request of a sound source point in a virtual scene; invoking a corresponding head-response transfer function (HRTF) according to a three-dimensional coordinate position relationship between the sound source point and a sound recipient in the virtual scene; modifying a parameter value of the HRTF according to the virtual scene where the sound source point is located; and performing filtering and delaying processing on a sound signal of the sound source point by using the modified HRTF. In the present disclosure, an HRTF parameter is modified flexibly according to audio effect requirements of a virtual scene, so that the technical problem that sound localization performed by using an HRTF database of existing hardware in some virtual scenes has undesirable effect is solved, thereby achieving the effect of optimizing three-dimensionally located audio effects.

To enable multichannel audio data to be transmitted favorably. Multichannel audio data of a predetermined number of channels is acquired. The multichannel audio data has a sampling frequency corresponding to the predetermined number of channels. Audio data of the respective channels configuring the multichannel audio data are sequentially transmitted to a reception side via a predetermined transmission channel for each unit audio data. Information indicating the sampling frequency is added to the transmission audio data.

In an audio signal processing device including a plurality of mixing buses to mix audio signals processed in a plurality of channels, a switching instruction to switch function of the mixing buses is accepted. In accordance with the switching instruction, operation mode of one or a plurality of switch mixing buses among the plurality of mixing buses is switched between a first mode and a second mode. In first mode, the audio signal processing device controls ON/OFF of signal transmission from each of the channels to the switch mixing bus in accordance with settings of ON/OFF of signal transmission from the each channel to the switch mixing bus, and in second mode, the audio signal processing device controls ON/OFF of signal transmission from each of the channels to the switch mixing bus in accordance with manipulation of cue controls respectively provided to correspond to any of the channels.

In an audio signal processing device including a plurality of mixing buses to mix audio signals processed in a plurality of channels, a switching instruction to switch function of the mixing buses is accepted. In accordance with the switching instruction, operation mode of one or a plurality of switch mixing buses among the plurality of mixing buses is switched between a first mode and a second mode. In first mode, the audio signal processing device controls ON/OFF of signal transmission from each of the channels to the switch mixing bus in accordance with settings of ON/OFF of signal transmission from the each channel to the switch mixing bus, and in second mode, the audio signal processing device controls ON/OFF of signal transmission from each of the channels to the switch mixing bus in accordance with manipulation of cue controls respectively provided to correspond to any of the channels.

An audio processor may receive audio input channels including stereo channels and one or more surround channels. The audio processor may downmix the audio input channels into stereo output channels; developing the stereo output channels into upmixed audio channels including at least one additional surround channel not present in the audio input channels; delay the audio input channels into delayed audio channels that are time-aligned with the upmixed audio channels; and mix the delayed audio channels and the upmixed audio channels into audio output channels.

An audio receiver that receives left, right, and center audio channels for a piece of sound program content is described. A content processor in the audio receiver generates separate audio signals corresponding to each channel for driving corresponding transducers in left and right loudspeaker arrays. The content processor generates (1) first center audio signals for driving transducers in the left array to generate a first center pattern, (2) second center audio signals for driving transducers in the right array to generate a second center pattern, (3) left audio signals for driving transducers in the left array to generate a left pattern, and (4) right audio signals for driving transducers in the right array to generate a right pattern. The first and second center patterns collectively represent the center channel while the left and right patterns respectively represent the left and right channels.

An audio receiver that receives left, right, and center audio channels for a piece of sound program content is described. A content processor in the audio receiver generates separate audio signals corresponding to each channel for driving corresponding transducers in left and right loudspeaker arrays. The content processor generates (1) first center audio signals for driving transducers in the left array to generate a first center pattern, (2) second center audio signals for driving transducers in the right array to generate a second center pattern, (3) left audio signals for driving transducers in the left array to generate a left pattern, and (4) right audio signals for driving transducers in the right array to generate a right pattern. The first and second center patterns collectively represent the center channel while the left and right patterns respectively represent the left and right channels.