Systems and methods for audio encoding and decoding

Patent metadata

Field	Value
Publication number	US-9607625-B2
Application number	US-201514816673-A
Country	US
Kind code	B2
Filing date	Aug 3, 2015
Priority date	Jun 3, 2013
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

Systems and methods are provided for audio encoding. For example, first quantization encoding is performed on audio data associated with a current frame of an audio data stream to obtain first quantization-encoded data; second quantization encoding is performed on the audio data to obtain second quantization-encoded data; the first quantization-encoded data is coupled to the current frame of the audio data stream; and the second quantization-encoded data is coupled to a next frame of the audio data stream.

First claim

What is claimed is:

1. A method for audio encoding, comprising:
performing first quantization encoding on audio data associated with a current frame of an audio data stream to obtain first quantization-encoded data;
performing second quantization encoding on the audio data to obtain second quantization-encoded data;
coupling the first quantization-encoded data to the current frame of the audio data stream;
coupling the second quantization-encoded data to a next frame of the audio data stream; and
initiating transmission of the first quantization-encoded data and the second quantization-encoded data to a decoding terminal, the decoding terminal being configured to obtain the current frame of the audio data stream by decoding the second quantization-encoded data in the next frame to avoid retransmission of the current frame when there is packet loss during the transmission.

2. The method of claim 1 , further comprising:
performing first spectral-band-replication encoding on the audio data to obtain first spectral-band-replication encoded data;
performing second spectral-band-replication encoding on the audio data to obtain second spectral-band-replication encoded data;
coupling the first spectral-band-replication encoded data to the current frame of the audio data stream; and
coupling the second spectral-band-replication encoded data to the next frame of the audio data stream.

3. A method for audio decoding, comprising:
obtaining an audio data stream, a current frame of the audio data stream including first quantization-encoded data corresponding to audio data associated with the current frame and second quantization-encoded data corresponding to audio data associated with a frame immediately preceding the current frame, a next frame of the audio data stream including first quantization-encoded data corresponding to audio data associated with the next frame and second quantization-encoded data corresponding to the audio data associated with the current frame;
determining whether the current frame of the audio data stream is lost;
in response to the current frame of the audio data stream not being lost,
obtaining the first quantization-encoded data from the current frame of the audio data stream; and
decoding the first quantization-encoded data to obtain the audio data associated with the current frame;

in response to the current frame of the audio data stream being lost,
obtaining the second quantization-encoded data from the next frame of the audio data stream; and
decoding the second quantization-encoded data to obtain the audio data associated with the current frame.

4. The method of claim 3 , further comprising:
in response to the current frame of the audio data stream not being lost,
obtaining first spectral-band-replication encoded data from the current frame of the audio data stream, the first spectral-band-replication encoded data being included in the current frame of the audio data stream and corresponding to the audio data associated with the current frame; and
performing band recovery on the audio data associated with the current frame based on at least information associated with the first spectral-band-replication encoded data;

in response to the current frame of the audio data stream being lost,
obtaining second spectral-band-replication encoded data from the next frame of the audio data stream, the second spectral-band-replication encoded data being included in the next frame of the audio data stream and corresponding to the audio data associated with the current frame; and
performing band recovery on the audio data associated with the current frame based on at least information associated with the second spectral-band-replication encoded data.

5. A system for audio encoding, comprising:
at least one data processor; and
memory storing instructions which, when executed by the at least one data processor, result in operations comprising:
performing first quantization encoding on audio data associated with a current frame of an audio data stream to obtain first quantization-encoded data;
performing second quantization encoding on the audio data to obtain second quantization-encoded data;
coupling the first quantization-encoded data to the current frame of the audio data stream;
coupling the second quantization-encoded data to a next frame of the audio data stream; and
initiating transmission of the first quantization-encoded data and the second quantization-encoded data to a decoding terminal, the decoding terminal being configured to obtain the current frame of the audio data stream by decoding the second quantization-encoded data in the next frame to avoid retransmission of the current frame when there is packet loss during the transmission.

6. The system of claim 5 , wherein the operations further comprise:
performing first spectral-band-replication encoding on the audio data to obtain first spectral-band-replication encoded data;
performing second spectral-band-replication encoding on the audio data to obtain second spectral-band-replication encoded data;
coupling the first spectral-band-replication encoded data to the current frame of the audio data stream; and
coupling the second spectral-band-replication encoded data to the next frame of the audio data stream.

7. A system for audio decoding, comprising:
at least one data processor; and
memory storing instructions which, when executed by the at least one data processor, result in operations comprising:
obtaining an audio data stream, a current frame of the audio data stream including first quantization-encoded data corresponding to audio data associated with the current frame and second quantization-encoded data corresponding to audio data associated with a frame immediately preceding the current frame, a next frame of the audio data stream including first quantization-encoded data corresponding to audio data associated with the next frame and second quantization-encoded data corresponding to the audio data associated with the current frame;
determining whether the current frame of the audio data stream is lost;
in response to the current frame of the audio data stream not being lost,
obtaining the first quantization-encoded data from the current frame of the audio data stream; and
decoding the first quantization-encoded data to obtain the audio data associated with the current frame;

in response to the current frame of the audio data stream being lost,
obtaining the second quantization-encoded data from the next frame of the audio data stream; and
decoding the second quantization-encoded data to obtain the audio data associated with the current frame.

8. The system of claim 7 , wherein the operations further comprise:
in response to the current frame of the audio data stream not being lost,
obtaining first spectral-band-replication encoded data from the current frame of the audio data stream, the first spectral-band-replication encoded data being included in the current frame of the audio data stream and corresponding to the audio data associated with the current frame; and
performing band recovery on the audio data associated with the current frame based on at least information associated with the first spectral-band-replication encoded data;

in response to the current frame of the audio data stream being lost,
obtaining second spectral-band-replication encoded data from the next frame of the audio data stream, the second spectral-band-replication encoded data being included in the next frame of the audio data stream and corresponding to the audio data associated with the current frame; and
performing band recovery on the audio data associated with the current frame based on at least information associated with t

Assignees

• Tencent Tech Shenzhen Co Ltd

Inventors

• Chen Guoming
• Peng Yuanjiang
• Ou Wenjun
• Peng Chao
• Liu Hong
• Long Xingping

Classifications

• H04L1/1867

  Arrangements specially adapted for the transmitter end · CPC title

• G10L19/032 Primary

  Quantisation or dequantisation of spectral components · CPC title

• H04L1/00

  Arrangements for detecting or preventing errors in the information received {(correcting synchronisation H04L7/00)} · CPC title

• G10L19/008

  Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing · CPC title