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

Method for realizing AMR-WB (adaptive multi-rate wideband) voice coding or decoding by adopting information hiding technology

A technology of information hiding and speech coding, which is applied in speech analysis, instruments, etc., can solve the problems of large number of parameter bits and large network overhead, etc., and achieve the effect of reducing coding rate, reducing network load, and reducing bandwidth occupation

Inactive Publication Date: 2011-08-24
SUZHOU INST FOR ADVANCED STUDY USTC
View PDF1 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method for AMR-WB speech coding using information hiding technology, which hides ISF parameters in fixed codebook parameters for transmission, and solves the problem caused by the large number of coded parameter bits in the prior art. Large network overhead and other issues

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 realizing AMR-WB (adaptive multi-rate wideband) voice coding or decoding by adopting information hiding technology
  • Method for realizing AMR-WB (adaptive multi-rate wideband) voice coding or decoding by adopting information hiding technology
  • Method for realizing AMR-WB (adaptive multi-rate wideband) voice coding or decoding by adopting information hiding technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0048] In order to fully disclose the content of the present invention, this embodiment first introduces the search principle of the AMR-WB fixed codebook. In the AMR-WB technical specification, the goal of searching for the best fixed codebook is to minimize the mean square error between the weighted input speech and the weighted reconstructed speech. The fixed codebook vector is a 64-dimensional vector with each pulse amplitude of +1 or -1.

[0049] The process of finding the best codebook vector is to find The process of the maximum value, where H is the lower triangular Toeplitz convolution matrix, d=H t x 2 is the target signal x 2 Cross-correlation of (n) and the impulse response h(n) of the perceptually weighted synthesis filter, φ=H t H is the autocorrelation matrix of h(n). Since the codebook vector c k Only some of them are non-zero pulses, and its codebook allows fast searching. AMR-WB reduces the search range each time by using the first depth tree search a...

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 a method for realizing AMR-WB (adaptive multi-rate wideband) voice coding or decoding by adopting an information hiding technology, capable of reducing coding parameter length and saving voice transmission bandwidth. The AMR-WB voice coder comprises a linear prediction (LPC) analysis module, a fundamental tone search module and a fixed codebook search module (comprising an information hiding sub module). The method comprises the following steps of: (1) extracting ISF (information system finishing) parameter coding by virtue of an LPC analysis module according to a coding rate mode, and dividing the parameter coding into hidden information ST to be embedded in a step (2); and (2) searching a second best codebook according with constraint conditions (I) in a local codebook space by adopting a first depth tree search algorithm by virtue of the fixed codebook search module, and embedding the ST into a fixed codebook index to be transmitted, wherein T is a number of a codebook track and is selected from a codebook track 0, a codebook track 1, a codebook track 2 and a codebook track 3; ST is ISF index information to be embedded in a codebook track T; NT is the number of nonzero pulses contained in the codebook track T; PTk is the kth pulse in the codebook track T; and M is an embedded bit control bit, and log2M is maximum bit number of embeddable information in each track. By applying the method, the coding speed is reduced, the resource utilization factor is improved, the method is simple and feasible, and no additional computation complexity is increased.

Description

technical field [0001] The invention belongs to the field of mobile communication, in particular to the technical field of speech coding, in particular to a method for using information hiding technology to perform AMR-WB speech coding or decoding, and reducing the length of coding parameters or the coding rate. Background technique [0002] Adaptive Multi-Rate Wideband Speech Coding (AMR-WB) is a wideband speech compression coding technology formulated by 3GPP / ETSI and used in the third generation mobile communication system WCDMA. It was also adopted by ITU-T as the G722.2 standard and became the first A speech coding technique used in both wireless and wired communications. AMR-WB supports 9 rate modes (23.85, 23.05, 19.85, 18.25, 15.85, 14.25, 12.65, 8.85, 6.6kbit / s), and solves the rate allocation problem of source and channel coding in a more intelligent way. In addition, AMR- WB provides a voice bandwidth ranging from 50HZ to 7000HZ, and users can subjectively experi...

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): G10L19/00G10L19/018G10L19/24
Inventor 缪海波黄刘生陈志立杨威
Owner SUZHOU INST FOR ADVANCED STUDY USTC
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