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High frequency coupled pseudo small wave 5-tracks audio encoding/decoding method

A decoding method and high-frequency coupling technology, which is applied in the field of high-frequency coupling pseudo-wavelet 5-channel audio encoding/decoding, and can solve problems such as audio signal perception information redundancy

Inactive Publication Date: 2007-11-14
BEIJING E WORLD TECH
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Problems solved by technology

On the other hand, the 5-channel audio is inherently correlated between the various channels, and the auditory characteristics of the human ear rely on spectral envelope positioning at the high-frequency end, resulting in a huge gap between the 5-channel audio signals. The perceptual information redundancy of , provides a considerable space for its further compression

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  • High frequency coupled pseudo small wave 5-tracks audio encoding/decoding method
  • High frequency coupled pseudo small wave 5-tracks audio encoding/decoding method
  • High frequency coupled pseudo small wave 5-tracks audio encoding/decoding method

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] Please refer to Fig. 1, a kind of pseudo-wavelet 5-channel audio encoding / decoding based on high-frequency coupling of the present invention, including but not limited to single- and dual-channel coding structures, and high-frequency coupling processing for 5 channels , it can be seen from the figure that except for the dotted box 10 in the middle, other structures are the same as the monophonic coding structure, that is, the 5-channel coding is extended from the monophonic coding. Input the 5-channel time-domain signal at the encoding end, and transmit the signal to signal type detection 1, psychoacoustic model 3 and pseudo-wavelet filter bank 2 respectively. After the signal is detected by type 1, it can be judged whether the signal is a slowly changing signal or The fast-changing signal is used to control the resolution of the pseudo-wavelet f...

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Abstract

A audio encode / decode method based on HF coupling for pseudo-wavelet channel No.5 includes such steps as inputting the time domain signal of channel 5 to encode port, transmitting it to the signal type detector for controlling the resolution of pseudo-wavelet filter set, the psychoacoustic model for controlling bit distribution in quantitization and encode, and the pseudo-wavelet filter set, calcualting correlative coefficient by calculation unit, choosing optimal couple mode, quantitizing and encoding the pseudo-wavelet coefficient, sending it along with side information to multi-channel code stream, and synthesizing.

Description

technical field [0001] The invention relates to a method for high-frequency coupling of a single channel, in particular to a high-frequency coupling pseudo-wavelet 5-channel audio encoding / decoding method. Background technique [0002] 5-channel audio is a form of audio application that is widely used in audio-visual fields such as movies, digital TV, home theater, and virtual reality. Audio-visual programs or media products using 5-channel audio are characterized by a strong sense of positioning, space, and reality, and can create a realistic sound field environment, bringing the audience an immersive listening experience and enjoyment. [0003] From a technical point of view, the original data volume of 5-channel digital audio signal is 5 times that of monophonic audio. This means that the storage, transmission, processing and playback of 5-channel audio are much more difficult than monophonic audio, and require the support of advanced digital compression technology. On ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/00H03M7/00G10L19/008
Inventor 潘兴德李鹏王磊
Owner BEIJING E WORLD TECH
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