Audio coding method and audio coding 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: 2016-01-06
HUAWEI TECH CO LTD
View PDF3 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
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
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0062] The technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0063] See figure 1 , Is a flowchart of an audio decoding method according to an embodiment of the present invention, and the method includes:
[0064] Step 101: For each audio frame in the audio, when the electronic device determines that the signal characteristics of the audio frame and the previous audio frame of the audio frame meet a preset correction condition, according to the LSF difference of the linear spectrum frequency of the audio frame The ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The embodiment of the invention discloses an audio coding method and an audio coding device. The audio coding method comprises the steps of as for each audio frame in audio frequency, when signal characteristics of the audio frame and signal characteristics of a previous audio frame are determined to meet a preset correction condition, determining a first correction weight according to a linear spectrum frequency (LSF) difference value of the audio frame and an LSF difference value of the previous audio frame; when the signal characteristics of the audio frame and the signal characteristics of the previous audio frame are determined not to meet the preset correction condition, determining a second correction weight, wherein the preset correction condition is used for determining that the audio frame is close to the previous audio frame in signal characteristic; carrying out correction on linear prediction parameters of the audio frame according to the determined first correction weight or the second correction weight; and coding the audio frame according to the corrected linear prediction parameters of the audio frame. According to the invention, audio frequency with broader bandwidth can be coded under the condition that the code rate is unchanged or that the code rate is slightly changed, and the frequency spectrum between the audio frames is more steady.
Description
Technical field [0001] The present invention relates to the field of communications, 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 devices. Increasing the bandwidth of the audio is the main method to improve the audio quality. If the electronic device uses the traditional encoding method to encode the audio to increase the audio quality Bandwidth will greatly increase the code rate of the audio coding information, so that when the audio coding information is transmitted between two electronic devices, it will occupy more network transmission bandwidth. The topic raised from this is: the code of the audio coding information Encode audio with a wider bandwidth when the rate remains the same or the bit rate does not change much. The solution proposed for this subject is to adopt frequency band expansion technology, which is...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
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