Check patentability & draft patents in minutes with Patsnap Eureka AI!

Telephone with improved capability and method for processing audio frequency signal therein

An audio signal, telephone technology, applied in the field of telephones, can solve problems such as unnaturalness, voice alienation, etc.

Inactive Publication Date: 2009-09-02
BROADCOM CORP
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reflected sound wave received by the near-end telephone makes the far-end user feel that the voice of the near-end user sounds alienated and unnatural

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
  • Telephone with improved capability and method for processing audio frequency signal therein
  • Telephone with improved capability and method for processing audio frequency signal therein
  • Telephone with improved capability and method for processing audio frequency signal therein

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0249] Before describing the first embodiment of the invention, it is helpful to describe the echo that occurs when the telephone is in hands-free mode.

[0250] When the phone is in hands-free mode, the speaker of the near-end phone emits sound waves corresponding to the voice of the far-end user. The sound waves allow the near-end user to hear the far-end user's voice. However, this sound wave will also be picked up by the microphone of the near-end telephone. In this way, the near-end phone will echo the voice of the far-end user back to the far-end user.

[0251] To reduce this echo emitted by the near-end telephone, an acoustic echo canceller (AEC) can be used. An echo canceller reduces the volume of echoes so that they are less annoying and / or annoying. Compared with conventional echo cancellers using only the output signal of a single microphone, the echo canceller according to the present invention can obtain improved echo canceling performance.

[0252] It should ...

no. 2 example

[0266] As mentioned above, in the second embodiment, the multiple microphones of the telephone set are configured as an adaptive microphone array to reduce the effects of room reflections and / or echoes. Figure 29 is a functional block diagram of the transmitting path 2900 and the receiving path 2950 of the telephone set according to the second embodiment. The transmission path 2900 includes a microphone array 2910, a DSP 2925, an encoder 2920, and a transmitter 2930, which are respectively connected to Figure 21 microphone array 2100, DSP 2105, Figure 26 The decoder 2620 and the transmitter 2630 of are similar. The receive path 2950 includes a receiver 2960, a decoder 2970, a speaker 2980, which communicate with Figure 26 Receiver 2660, decoder 2670, speaker 2680 are similar.

[0267] Each microphone of the microphone array 2910 is configured to receive sound waves from the surrounding environment and generate corresponding audio signals. DSP 2925 receives audio signal...

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 present invention relates to a telephone with multiple microphones having improved performance in hands-free mode. For example, the multiple microphones may be used to improve voice activity detection, which in turn is used to improve echo cancellation. Additionally, the multiple microphones may be configured as an adaptive microphone array for reducing (1) room reflection effects when the near-end user is speaking and (2) echoes when the far-end user is speaking.

Description

technical field [0001] The present invention relates to telephones, and more particularly to improved performance of telephones in speaker-phone mode. Background technique [0002] Many telephones come with a hands-free mode. However, using hands-free mode will result in a decrease in phone performance. This adverse effect depends on which party is speaking - that is, whether the user of the far-end phone is speaking or the user of the near-end phone is speaking. [0003] When the far-end user is talking, the near-end phone in hands-free mode will have an acoustic echo. For example, when the voice signal of the far-end user outputted by the speaker of the near-end telephone is received by the microphone of the near-end telephone, so-called "echo" may occur. When this happens, the echo will be transmitted back to the far-end user through the near-end telephone. [0004] A near-end phone using hands-free mode may experience room reverberations when the near-end user is spe...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H04M9/08H04M1/725
Inventor 朱因韦·陈詹姆士·D·贝内特
Owner BROADCOM CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com