Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for switching audio encoder

An audio encoder and audio technology, applied in code conversion, instrumentation, voice analysis, etc., can solve the problems of unused encoding quality, difficulty in optimizing the combination of core encoders, and inaccurate switching, so as to improve accuracy efficiency, reduce design cost, and overcome the effect of large amount of calculation

Inactive Publication Date: 2008-07-16
TSINGHUA UNIV
View PDF0 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The calculation amount of this method is much lower than that of the closed-loop method, and it is more suitable for mobile communication applications. However, due to its inaccurate switching, the quality of the final encoding is not as good as that of the closed-loop method. It is difficult to achieve a specific combination of core encoders. best

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for switching audio encoder
  • Method for switching audio encoder
  • Method for switching audio encoder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031] The hybrid audio encoder in the embodiment of the present invention includes but is not limited to a combination of an EAAC+ encoder and an ACELP encoder, and the like. For other combinations of encoders, the technical solutions in the embodiments of the present invention are still applicable.

[0032] Referring to Fig. 1, an embodiment of the present invention provides a method for switching audio encoders, which specifically includes:

[0033] Step 101: Select a plurality of typical audio sequences from a high-quality sound effect database.

[0034] In this embodiment, 97 typical music sequences are selected, and their contents relate to various sounds such as nature, human life, machinery, traffic, synthetic sound, music, an...

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

No PUM Login to View More

Abstract

The invention discloses an audio coder switching method which belongs to the multimedia signal processing and source encoding field. The method comprises that: a plurality of audio sequences are selected as training data; according to a preset rule and the training data, a classifier is trained; the rule is achieved by adopting a subjective tone quality evaluating method after a plurality of audio sequences are tested; when an audio signal is input, according to the trained result, the audio signal is classified by the classifier and switched to a corresponding audio coder for coding. The invention uses a subjective tone quality test result to train the classifier in order that the classifier can approach to subjective hearing and select a proper coder for switching, thereby overcoming the disadvantages of large calculating amount of an AMR-WB+closed loop switching method; compared with an AMR-WB+open loop switching method, the invention greatly improves the switching accuracy and ensures the coding quality.

Description

technical field [0001] The invention relates to the fields of multimedia signal processing and information source coding, in particular to a method for switching audio coders. Background technique [0002] With the continuous expansion of multimedia communication applications, people's requirements for the quality of multimedia data transmission are also gradually increasing. Audio and video data constitute two important components of multimedia data. From the perspective of audio transmission, people have gradually transitioned from only wishing to transmit voice on the phone to now wishing to transmit high-quality wideband audio on mobile phones, including a large amount of music. The large increase in the amount of transmission of required audio data and the limitation of communication bandwidth have become a new contradiction. Since a large amount of transmission bandwidth is also allocated to video data, it is necessary to transmit an audio signal with a larger bandwi...

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
no application Login to View More
IPC IPC(8): G10L19/14H03M7/30G10L19/16
Inventor 窦维蓓张斌张树华夏田侯欢贾晓军
Owner TSINGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com