Method and device for processing audio/video signal

An audio, video and signal technology, applied in the field of communication system parameter detection and signal processing, can solve problems such as increased bit error rate, failure to pass through, and impact on video phone service quality, and achieve the effect of enhanced anti-bit error capability

Active Publication Date: 2008-09-24
LEADCORE TECH
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AI Technical Summary

Problems solved by technology

[0003]Because the communication channel (especially the wireless channel) carrying the audio and video signal is often affected by the external communication environment, it may be mistaken for a period of time As the bit rate increases, the mosaic of the image presented at the terminal increases, but the existing

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  • Method and device for processing audio/video signal
  • Method and device for processing audio/video signal
  • Method and device for processing audio/video signal

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Embodiment Construction

[0049] Please refer to figure 1 , is the physical link diagram of the video telephony service. Terminal A and terminal B perform video telephony services. During the transmission of audio and video signals, they need to go through wireless channels (the dotted line in the figure) and wired channels (the solid line in the figure) , the H.223 multiplexing protocol stipulates that when the amount of AL (Adapt Layer, adaptation layer data) data to be sent is insufficient, the terminal will fill the stuffing data (filling data). Moreover, the protocol stipulates that the filling data is a fixed signal sequence: 5 bytes of hexadecimal number 0xE14D000000.

[0050] The invention discloses a method for detecting channel bit error rate. The basic idea of ​​the invention is to determine the current channel bit error rate by detecting the bit error rate of filling data. Please refer to figure 2 , is a flow chart of an embodiment of a method for detecting a channel bit error rate in th...

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Abstract

The invention discloses a method for detecting a bit error rate of a channel which comprises: the filling data of an audio and video signal is obtained; the filling data and the prescient filling data are compared and the bit error rate of the current channel is confirmed according to a comparing result. The invention also discloses a device for detecting the bit error rate of the channel; besides, the invention also discloses a method and device for treating an audio and video signal based on the method and the device. The invention can be utilized to confirm the bit error rate of the current channel by calculating the bit error rate of the filling data; thereby being able to adjust the coding parameter of the audio and video signal to be transmitted according to the bit error rate situation of the current channel so as to lead the capacity of anti-bit error rate of the audio and video signal to be improved, thus avoiding the situation of serious mosaics on an image from appearing.

Description

technical field [0001] The invention relates to the technical field of communication system parameter detection and signal processing, and more specifically, to a method and device for processing audio and video signals. Background technique [0002] In the video telephony (Video Telephony) service of TD-SCDMA, the H.234M protocol stack is used as the in-band communication protocol. The H.234M protocol stack mainly includes the H.223 protocol and the H.245 protocol, and the H.223 protocol completes the control Multiplexing and demultiplexing of data, audio data, video data and other data, the H.245 protocol completes the call control function. In this video phone service, the terminal first establishes a CSD64K bearer channel, and then uses the H.234M protocol to establish a video phone channel. Audio and video signals are transmitted on the channel. [0003] Since the communication channel (especially the wireless channel) carrying the audio and video signals is often affe...

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Application Information

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IPC IPC(8): H04L1/00H04L1/18H04L29/06H04N7/14
Inventor 裘风光朱胜
Owner LEADCORE TECH
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