A kind of audio coding method and device
A technology for audio coding and audio frames, applied in the field of audio coding methods and devices, capable of solving problems such as discontinuous spectrum between audio frames
Active Publication Date: 2016-12-28
HUAWEI TECH CO LTD
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However, in the case of relatively high requirements for codec error accuracy, this encoding method will cause discontinuity in the frequency spectrum between audio frames
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[0062] The following will clearly describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0063] see figure 1 , which is a flowchart of an audio decoding method according to an embodiment of the present invention, the method comprising:
[0064] Step 101: For each audio frame in the audio, the electronic device determines that when the signal characteristics of the audio frame and the previous audio frame of the audio frame meet the preset correction condition, according to the linear spectral frequency LSF difference of the audio frame value and t...
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The embodiment of the present invention discloses an audio encoding method and device, including: for each audio frame in the audio, when determining that the signal characteristics of the audio frame and the audio frame preceding the audio frame meet a preset correction condition, Determine a first correction weight according to the linear spectral frequency LSF difference of the audio frame and the LSF difference of the previous audio frame; determine that the signal characteristics of the audio frame and the previous audio frame do not meet a preset correction condition , determine the second correction weight; the preset correction condition is used to determine that the signal characteristics of the audio frame and the previous audio frame of the audio frame are similar; according to the determined first correction weight or the second The modification weight modifies the linear prediction parameter of the audio frame; and encodes the audio frame according to the modified linear prediction parameter of the audio frame. The present invention can encode audio with a wider bandwidth under the condition that the code rate is constant or the code rate does not change much, and the frequency spectrum between audio frames is more stable.
Description
technical field [0001] The present invention relates to the communication field, in particular to an audio coding method and device. Background technique [0002] With the continuous advancement of technology, users have higher and higher requirements for the audio quality of electronic equipment. Among them, increasing the bandwidth of audio is the main method to improve audio quality. If electronic equipment uses traditional encoding methods to encode audio to increase the audio quality The bandwidth will greatly increase the code rate of the audio coded information, so that when the audio coded information is transmitted between two electronic devices, it will occupy more network transmission bandwidth. Encode audio with a wider bandwidth when the bit rate remains the same or the bit rate does not change much. The solution proposed for this subject is to adopt frequency band extension technology, which is divided into time domain frequency band extension technology and f...
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IPC IPC(8): G10L19/04G10L19/06
CPCG10L19/00G10L19/12G10L19/06G10L19/02G10L19/04G10L25/12G10L19/025
Inventor 刘泽新王宾苗磊
Owner HUAWEI TECH CO LTD