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Codec and Codec Method for Transmitting Three-Dimensional Sound Signal Using Multiple Channels

An encoder and decoder technology, applied in the field of codecs, can solve problems that have not been widely used

Active Publication Date: 2019-12-17
WAVARTS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As a new technology and system that has just emerged, 3D sound has not been widely used, and its promotion requires a long development stage

Method used

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  • Codec and Codec Method for Transmitting Three-Dimensional Sound Signal Using Multiple Channels
  • Codec and Codec Method for Transmitting Three-Dimensional Sound Signal Using Multiple Channels
  • Codec and Codec Method for Transmitting Three-Dimensional Sound Signal Using Multiple Channels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The three-dimensional sound signal is composed of a multi-channel signal (that is, a basic channel) and / or a sound object signal (including object rendering description information and object audio data). In order to meet the needs of backward compatible multi-channel (stereo, surround sound) programs or systems, the three-dimensional sound coding method proposed by the present invention will down-mix the three-dimensional sound signal into compatible down-mixing compatible basic channel data according to the down-mixing scheme , encode the downmix scheme, the extended basic channel, the side information of the basic channel division, and the sound object to obtain the extended coded data. Among them, the downmix compatible basic channel data is processed and then transmitted by AES / EBU channel; the extended coded data is processed and packaged together for transmission through other transmission channels, such as network, USB, etc.

[0059] For example, if the three-di...

Embodiment 2

[0098] Such as figure 2 As shown, the three-dimensional vocoder provided by the present invention includes a downmix module, a basic channel division module, an extended coding module, a DCP packing module, and an extended coded data packing module when the system self-adaptively selected downmixing scheme is adopted. The difference from Embodiment 1 is that the downmixing and basic channel division module is divided into a downmixing module and a basic channel division module.

[0099] Step 2.1) Downmix module

[0100] According to the down-mixing scheme adaptively selected by the system, the 3D sound program is down-mixed into a compatible stereo / multi-channel signal, and the down-mixed compatible basic channel signal is obtained Output the downmixing scheme used.

[0101] As mentioned earlier, the downmix compatible basic channel signal includes the basic channel downmix component and the sound object downmix component:

[0102]

[0103] The basic channel downmixing...

Embodiment 3

[0198] Such as Figure 5 As shown, the three-dimensional sound encoder provided by the present invention includes a downmix module, a basic channel division module, an extended encoding module, a DCP packing module, and an extended encoded data packing module. The difference from Embodiment 2 is that the down-mixing scheme adopts an external input.

[0199] Step 3.1) Basic channel division module

[0200] According to the downmixing scheme of external input (for example, it can be expressed by a set of mapping functions fb(k,i), fo(k,j)), the basic channel is divided into two parts: compatible basic channel and extended basic channel. And determine the basic channel division side information (such as) betob(m), bctob(n).

[0201] If the 3D sound program does not include the basic sound channel, or there is a simple and clear one-to-one correspondence between the compatible basic sound channel, the extended basic sound channel and the basic sound channel, step 3.1) may not be...

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Abstract

The invention discloses an encoder and decoder for transmitting three-dimensional sound signals by using multiple channels, a coding method and decoding method of the encoder and decoder. The encodercomprises a down-mixing and base channel division module, an extended coding module, a DCP packing module and an extended coded data packing module; the down-mixing and base channel division module isused for receiving a base channel and / or a sound object, performing down-mixing and base channel division operation according to a down-mixing scheme and outputting down-mixed compatible base channeldata, an extended base channel and base channel division side information; the extended coding module is used for receiving the sound object, the down-mixing scheme, the extended base channel and thebase channel division side information and outputting extended coded data; the DCP packing module is used for receiving the down-mixed compatible base channel data and packing the down-mixed compatible base channel data into DCP code streams according to a DCP standard; and the extended coded data packing module is used for receiving the extended coded data and outputting extended coded data streams. The encoder, decoder, coding method and decoding method of the invention are compatible with movie servers according with the DCP protocol so as to realize direct playing and can realize three-dimensional sound playback of cinemas when three-dimensional sound processors are adopted to perform playing.

Description

technical field [0001] The invention relates to the technical field of three-dimensional sound codec processing, in particular to a codec for transmitting three-dimensional sound signals through multiple channels and a codec method thereof. Background technique [0002] After years of development, stereo, 5.1, 7.1 surround sound and other systems have been widely used. Due to the lack of sound height information, these systems can only present two-dimensional sound at most. In the real world, 3D sound is the most realistic way of presenting and expressing sound. Regardless of nature, art or audio-visual entertainment, 3D sound is the future development trend. [0003] In existing systems, the three-dimensional sound can be a multi-channel signal (such as 9.1, 11.1, 13.1, and 22.2, etc.), multiple sound objects, or a combination of both. In a three-dimensional sound system, the multi-channel signal can be a surround sound signal, such as 5.1, 7.1, etc., or a multi-layer mult...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04S3/00H04S5/00
CPCH04S3/00H04S3/008H04S5/00H04S2420/01
Inventor 潘兴德陈笑天吴超刚
Owner WAVARTS TECH CO LTD
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