Method for eliminating echo generated by playing voice file to TDM side and electronic equipment
A technology of echo cancellation and voice files, which is applied in the field of VoIP communication and can solve problems such as poor user experience
Active Publication Date: 2020-06-02
GENEW TECH
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Problems solved by technology
[0005] In view of the deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a kind of elimination method and the electronic equipment that play voice file to the TDM side and produce the echo for the user, overcome the phone when playing the recorded voice file, due to playback voice Poor user experience and some functional defects caused by echo problems
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[0033] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0034] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof. It will be understood that when an element is referred to as being "...
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The invention provides a method for eliminating an echo generated by playing a voice file to a TDM side and electronic equipment, and the method comprises the steps: reading voice data at intervals ofpreset time, and carrying out the linear expansion on the voice data to form first data; replacing the decoded data from the IP receiving direction with the first data, and inputting the first data into an echo canceller; meanwhile, compressing the first data in the IP receiving direction to generate second data, and copying the second data to a TDM DMA sending memory of the voice channel; and enabling an echo canceller to perform echo cancellation on the voice data copied to the TDM DMA sending memory of the voice channel. According to the method, the echo canceller takes the played-back voice data as the reference of the far-end signal, so that the echo generated when the voice file is played back is cancelled. Due to the fact that echo interference is eliminated, a far-end user cannothear voice played to a near-end user, and a good voice communication effect can be achieved.
Description
technical field [0001] The invention relates to the technical field of VoIP communication, in particular to a method for eliminating echo generated by playing a voice file to a TDM side and electronic equipment. Background technique [0002] VoIP (Voice over Internet Protocol) IP-based voice transmission is to digitize the analog signal (Voice) and transmit it in real time on the IP network (IP Network) in the form of data packets (Data Packet). VoIP can transmit services such as voice, fax, video, and data on the IP network. [0003] At present, the way for the media gateway to play the recorded voice files to the telephone is to first transmit the recorded voice files to the DSP (Digital Signal Processor), and the DSP saves the recorded voice files in the local memory, and then transfers the recorded voice files to the local memory. The voice signal is played back. The playback operation to the TDM side is to directly copy the local memory data to the DMA memory sent by ...
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IPC IPC(8): H04M7/00H04M9/08
CPCH04M7/006H04M9/082
Inventor 郭军勇孟庆晓吴闽华
Owner GENEW TECH