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Audio codec and decoding method using efficient downmixing

A technology of audio decoder and encoding method, which is applied in the field of audio signal processing, and can solve the problems such as the limitation of the battery life of the main processing unit of the portable device

Active Publication Date: 2016-05-11
DOLBY LAB LICENSING CORP +1
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Problems solved by technology

For example, the battery life of a portable device is primarily limited by the power consumption of its main processing unit

Method used

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  • Audio codec and decoding method using efficient downmixing
  • Audio codec and decoding method using efficient downmixing
  • Audio codec and decoding method using efficient downmixing

Examples

Experimental program
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Embodiment 210

[0110] Decoder Converter: The Decoder Converter is configured to, when executed, decode an AC-3 / E-AC-3 input bitstream (up to 5.1 channels) to PCM audio, and / or convert an input bitstream from E -AC-3 converts to AC-3. The decoder converter has three main subcomponents and can be implemented on Figure 2B Example 210 shown in . These main subcomponents are:

[0111] Front-End Decoding: The FED module is configured to, when executed, decode frames of the AC-3 / E-AC-3 bitstream into raw frequency-domain audio data and its accompanying metadata.

[0112] Backend Decoding: The BED module is configured to, when executed, complete the remainder of the decoding process initiated by the FED module. In particular, the BED module decodes audio data (with mantissa and exponent format) into PCM audio data.

[0113] Backend encoding: The backend encoding module is configured to, when executed, encode the AC-3 frame using six chunks of audio data from the FED. The backend encoding modul...

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Abstract

A method, an apparatus, a computer-readable storage medium configured with instructions for performing the method, and logic for performing actions encoded in one or more computer-readable tangible media. The method decodes audio data including N.n channels into M.m decoded audio channels, including: unpacking metadata and unpacking and decoding frequency domain exponent and mantissa data; determining transformation according to the unpacked and decoded frequency domain exponent and mantissa data coefficients; inverse transform the frequency domain data; and in M

Description

[0001] The application date of this invention is February 3, 2011, the international application number is "PCT / US2011 / 023533", the national application number is "201180002121.4", and the invention name is "Audio decoder and decoding method using high-efficiency down-mixing "A divisional application of the invention patent application. [0002] Cross References to Related Applications [0003] This application claims priority to U.S. Provisional Patent Application No. 61 / 305,871, filed February 18, 2010, and U.S. Provisional Patent Application No. 61 / 359,763, filed June 29, 2010, both in their entirety Incorporated herein by reference. technical field [0004] The present disclosure generally relates to audio signal processing. Background technique [0005] Digital audio data compression has become an important technology in the audio industry. New formats have been introduced that allow high quality audio reproduction without requiring the high data bandwidth required t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/008H04S3/00
CPCH04S3/008G10L19/02G10L19/008G10L19/06G10L19/167G10L19/24H04R5/02G10L19/022
Inventor 罗宾·特辛詹姆斯·M·席尔瓦罗伯特·L·安德森
Owner DOLBY LAB LICENSING CORP
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