Audio communication system

An audio communication and audio signal technology, applied in telephone communication, transmission system, wired transmission system, etc., can solve the problems of signal volume distortion, echo canceller 402 can not completely realize echo cancellation, etc., and achieve hardware size expansion, Effect of preventing increase in circuit size and cost

Inactive Publication Date: 2007-11-14
SONY CORP
View PDF1 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] If the source signal output from the speaker is directly DA-converted and output, it may happen that, for example, distortion occurs depending on the

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
  • Audio communication system
  • Audio communication system
  • Audio communication system

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Next, preferred embodiments of the present invention will be described with reference to the drawings. Fig. 1 is a schematic diagram showing the configuration of an audio communication system according to an embodiment of the present invention.

[0030] The auxiliary input terminal 101 (AUX) is connected to a high-quality sound source, such as a Super Audio CD or DVD audio player. The signal input from the auxiliary input terminal 101 (AUX) is sampled at a sampling frequency of, for example, 96 kHz, and converted into a digital signal by the AD converter 201 (ADC).

[0031] For example, the microphone input terminal 102 (MIC) is connected to a microphone for collecting audio. The signal input from the microphone input terminal 102 (MIC) is sampled at a sampling frequency of 96 kHz, for example, and converted into a digital signal by the AD converter 202 (ADC).

[0032] The sampling rate converter 302 (D.S.) (down sampling) is a circuit that performs sampling rate conversion...

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

An audio communication system includes a first analog/digital convertor, a second analog/digital convertor, and an echo canceller. The first analog/digital convertor converts an audio signal, which is input from a microphone, to a data signal. The second analog/digital convertor that converts an audio signal, which is input from an auxiliary input terminal, to a data signal. When an audio signal transmitted from the outside is received and output from a speaker, the echo canceller prevents an output of the speaker from being input through the microphone and echoed back to a recipient or remote device. An operating frequency of the echo canceller is relatively lower than a sampling frequency of the second analog/digital convertor.

Description

[0001] Related Application Cross Reference [0002] The present invention contains subject matter of Japanese Patent Application JP2006-054331 filed in the Japan Patent Office on Mar. 1, 2006, the entire content of which is hereby incorporated by reference. technical field [0003] The present invention relates to an audio communication system that performs transmission and reception of audio signals (ie, communication) with high sound quality. Background technique [0004] Figure 3 shows an example of a previously proposed or existing audio communication system, such as a video conferencing or telephone unit or system (unless otherwise specifically stated or referred to, the term "audio" is used hereinafter to refer to any such "Voice" and "Voice"). An auxiliary input terminal 101 (AUX) is a terminal for connecting a sound source such as a CD (Compact Disc Read Only). A signal input from the auxiliary input terminal 101 (AUX) is sampled at, for example, a sampling frequen...

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): H04M9/08H04M1/60H04B3/20
CPCH04M9/082
Inventor 松井丈
Owner SONY CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap