Audio input system used in home environment based on microphone array

A microphone array and audio input technology, applied in the direction of sensors, sensor components, instruments, etc., to achieve good technical support and satisfactory performance

CN102164328AActive Publication Date: 2011-08-24INST OF ACOUSTICS CHINESE ACAD OF SCI
5 Cites 67 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2011-08-24

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides an audio input system used in home environment based on a beam-forming microphone array. The audio input system receives an audio input from a user by using the microphone array which is arranged at the circumference of a television in a living room or embedded in the television. The audio input system specifically comprises the microphone array, a beam-forming module, a target sound detection module, an echo eliminating module and a back filtering module, wherein the microphone array comprises a plurality of microphone array elements used for extracting multichannel audio signals in the home living room environment; the beam-forming module is used for directionally enhancing the sound along a target direction as well as simultaneously resisting sound sources from other directions; the target sound detection module is used for judging the starting and ending end points of a target sound section; the echo eliminating module is used for removing a sound signal of a television loudspeaker; and the back filtering module is used for eliminating the irrelevant diffused background noises. The invention also provides an audio input system based on a blind-separation microphone array. The two systems are both used for inputting the audio signals in the home network environment based on the microphone array.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to an input front-end processing method of an audio interactive system based on a microphone (also known as a microphone) array that can be matched with a TV set, and specifically relates to an audio input system based on a microphone array for a home environment / . Background technique

[0002] With the broadbandization of the network and the popularization of home gateways, home high-definition communication and human-computer interaction services with TVs as terminals will emerge in large numbers in the next few years. In the market, the concept of Internet TV has been widely accepted by domestic and foreign manufacturers and a large number of related products have been launched in the past two years; home gateway products are in the ascendant with the accelerated progress of triple play. However, the related high-definition audio and interactive services have not yet achieved a breakthrough.

[0003] As the center of...

Examples

Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0045] figure 1 An implementation form of the audio input system based on the microphone array of the system to be described in the present invention is given. First, a microphone array extracts audio signals from the environment. The sound source localization module is used to array the picked-up signals in the noise background to determine the specific location of the sound source. The localization technology applies generalized cross-correlation phase transformation (GCC-PHAT) and steerable beam response phase transformation (SRP-PHAT) to TV In interactive scenarios, providing sound source location information for beamforming allows the system to adjust the beam to the target voice direction; the beamforming module realizes directional enhancement of voice in the target direction, and at the same time resists sound sources from other directions as m...