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Multi-channel encoder

An encoder, multi-channel technology, applied in the field of multi-channel encoders

Inactive Publication Date: 2007-04-04
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such a feature renders the inclusion of additional channels problematic, since the playback time interval or audio performance quality for a given data carrier storage capacity will have to be correspondingly sacrificed to accommodate more channels

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Embodiment Construction

[0057] In order to improve the encoding performed in a multi-channel encoder which is provided with N channels of input data and which is used to encode the input data to generate a corresponding encoded output data stream, the present The inventors have conceived that the encoder is advantageously operable to:

[0058] (a) down-mixing the input data of the N channels into M channels, so that M

[0059] (b) When generating the output data stream, a relatively small amount of parametric overhead data is generated to combine the data of the M channels, which is used to be able to reconstruct the corresponding data of N channels.

[0060] For example, the multi-channel encoder is preferably a five-channel encoder, ie N=5. The five-channel encoder is configured to down-mix data corresponding to five input channels to generate two channels of intermediate data, ie M=2. Furthermore, the five-channel encoder is operable to generate associated parametric overhead data suffic...

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Abstract

There is described a multi-channel encoder (10) for processing input signals (300, 310, 320, 330, 340) conveyed in N input channels to generate corresponding output signals (480, 490) conveyed in M output channels together with complementary parametric data (370, 430, 450); M and N are integers wherein N>M. The encoder (10) includes a down-mixer for down-mixing the input signals (30, 310, 320, 330, 340) to generate the corresponding output signals (480, 490), the encoder also comprising an analyser for processing the input signals (300, 310, 320, 330, 340) to generate the parameter data (370, 430, 450), said parametric data describing mutual differences between the N channels of input signal to allow for regenerating during decoding one or more of the N channels of input signals from the M channels of output signal. Such an encoder (10) is capable of providing highly efficient data encoding and also of being backwards compatibility with relatively simpler decoders having fewer than N decoding output channels. The invention also concerns decoders compatible with such a multi-channel.

Description

technical field [0001] The invention relates to multi-channel encoders, such as multi-channel audio encoders using a parametric description of spatial audio. Furthermore, the invention also relates to a method of processing a signal, such as a spatial audio signal, in such a multi-channel encoder. Furthermore, the invention relates to a decoder operable to decode a signal generated by such a multi-channel encoder. Background technique [0002] In recent years, audio recording and reproduction has evolved from monaural single-channel formats to two-channel stereo formats and more recently to multi-channel formats, such as the five-channel audio formats often used in home theater systems. The introduction of Super Audio Compact Disc (SACD) and Digital Video Disc (DVD) data carriers has brought about a presently increasing interest in such five-channel audio reproduction. Many users currently have equipment in their homes capable of providing five-channel audio playback; acco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/00G10L19/008
Inventor D·J·布里巴特E·G·P·舒伊杰斯G·H·霍托M·W·范卢恩
Owner KONINKLIJKE PHILIPS ELECTRONICS NV