Automatic aligning method for echo canceling data

Abstract

The invention provides a aftersound eliminating data automatically alignment method, the steps are following: step 1, receiving the audio frequency data sampled by audio frequency sampling module and audio frequency playing data sampled by the audio frequency playing data; step 2. The audio frequency sampling data and audio frequency playing data are transferred into audio frequency format supported by aftersound suppressor; step 3. The audio frequency sampling data and audio frequency playing data which are after transmission are written into data buffer area; step 4. When the data buffer area is written completely, aligning the audio frequency sampling module and audio frequency playing module; step 5. The audio frequency sampling module and audio frequency playing module aligned are placed into the aftersound eliminating module for process, sending the sampling data block; step 6. Return step 1. By adopting the invention, the audio frequency data is aligned automatically in buffer, and then they are sent into the aftersound suppressor, it can increase the aftersound eliminating capability of the aftersound eliminating module.

Description

【Technical field】 [0001] The invention relates to a method for echo cancellation, in particular to a method for automatically aligning data in the process of echo cancellation. 【Background technique】 [0002] The echo cancellation module is an essential module in audio conversations, and it is used in applications such as instant messaging and video conferencing. Whether the data sent to the echo cancellation is aligned (synchronized) is the premise and basis for ensuring the normal operation of the echo cancellation module. The existing echo cancellation technology basically adopts a simple method of buffering audio playback data and audio collection data, and does not make targeted and accurate adjustments to the situation of the buffer zone, nor does it adjust according to the specific conditions of echo processing. The data of the data buffer. In addition, clock drift commonly exists in existing sound cards, which will aggravate data misalignment. In this way, since t...

AI Technical Summary

Problems solved by technology

The existing echo cancellation technology basically adopts a simple method of buffering audio playback data and audio collection data, and does not make targeted and accurate adjustments to the situation of the buffer zone, nor does it adjust according to the specific conditions of echo processing. Data in the data buffer

In addition, clock drift commonly exists in existing sound cards, which will aggravate data misalignment

In this way, since there is no automatic data alignment technology for echo cancellation, the echo cancellation module directly compares and processes more data. On the one hand, it will waste CPU resources, resulting in low processing capacity and unstable performance of echo cancellation. Miscomparison occurs, which degrades the sound quality after processing

Images