Multi-channel video communication system and method for processing multi-channel video communication
First Claim
1. A method for processing multi-channel video communication, comprising:
- encoding a video source to generate a scalable original video bit-stream;
obtaining device capabilities and network conditions of a remote client device;
calculating a filter parameter according to the device capabilities and the network condition;
truncating the original video bit-stream according to the filter parameter, obtaining a final video bit-stream and sending the final video bit-stream to the remote client device;
wherein the filter parameter comprises;
a priority threshold used in truncating the bit-stream according to priorities of bit-stream packets in the video bit-stream;
the priority threshold is calculated by applying a selecting method to parameter information stored in a storing unit according to the device capabilities and the network conditions of the remote client device;
the parameter information is a cyclic queue of information of all bit-stream packets in an image group;
the image group includes a first key frame and frames between the first key frame and a second key frame in the scalable original video bit-stream;
the second key frame is a key frame immediately preceding the first key frame in a basic quality layer of the scalable original video bit-stream.
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Abstract
The present invention provides a multi-channel video communication system which includes a scalable video codec, a bit-stream truncating module, a network module and a multi-channel bit-stream truncating control module. The scalable video codec encodes a video source to generate a scalable original video bit-stream. The bit-stream truncating module is set between the scalable video codec and the network module, truncates the original video bit-stream to obtain a final video bit-stream and sends the final video bit-stream to the remote client device through the network module. The multi-channel bit-stream truncating control module is connected with the bit-stream truncating module, calculates a filter parameter for each bit-stream truncating unit in the bit-stream truncating module based on received device capabilities and network conditions of the remote client device. The present invention also provides a multi-channel video communication method in the above multi-channel video communication system.
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Citations
5 Claims
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1. A method for processing multi-channel video communication, comprising:
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encoding a video source to generate a scalable original video bit-stream; obtaining device capabilities and network conditions of a remote client device; calculating a filter parameter according to the device capabilities and the network condition; truncating the original video bit-stream according to the filter parameter, obtaining a final video bit-stream and sending the final video bit-stream to the remote client device; wherein the filter parameter comprises;
a priority threshold used in truncating the bit-stream according to priorities of bit-stream packets in the video bit-stream;
the priority threshold is calculated by applying a selecting method to parameter information stored in a storing unit according to the device capabilities and the network conditions of the remote client device;
the parameter information is a cyclic queue of information of all bit-stream packets in an image group;
the image group includes a first key frame and frames between the first key frame and a second key frame in the scalable original video bit-stream;
the second key frame is a key frame immediately preceding the first key frame in a basic quality layer of the scalable original video bit-stream. - View Dependent Claims (2)
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3. A method for processing multi-channel video communication, comprising:
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encoding a video source to generate a scalable original video bit-stream; obtaining device capabilities and network conditions of a remote client device; calculating a filter parameter according to the device capabilities and the network condition; truncating the original video bit-stream according to the filter parameter, obtaining a final video bit-stream and sending the final video bit-stream to the remote client device; wherein the filter parameter comprises;
a priority threshold used in truncating the bit-stream according to priorities of bit-stream packets in the video bit-stream;
the priority threshold is calculated according to the device capabilities and the network conditions of the remote client device and parameter information stored in a storing unit;
the parameter information is a cyclic queue of information of all bit-stream packets in the latest image group;wherein calculating the filter parameter includes; sorting information of the bit-stream packets in the cyclic queue in a descending order of priority, allocating index numbers to the information of the bit-stream packets with smaller index numbers allocated to information of bit-stream packets of higher priority; traversing, by each bit-stream truncating unit, all bit-stream packets in an ascending order of the index number;
determining whether an update condition is met based on processing capabilities and network bandwidth of all connected client devices;
updating the priority threshold in response to a determination that the update condition is met;
or not updating the priority threshold in response to a determination that the update condition is not met;
checking whether all the bit-stream packets are processed after all the bit-stream truncating units have traversed the current bit-stream packet;ending the processing in response to a determination that all the bit-stream packets are processed;
or processing another bit-stream packet in response to a determination that all the bit-stream packets are not processed. - View Dependent Claims (4)
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5. A method for processing multi-channel video communication, comprising:
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encoding a video source to generate a scalable original video bit-stream; obtaining device capabilities and network conditions of a remote client device; calculating a filter parameter according to the device capabilities and the network condition; truncating the original video bit-stream according to the filter parameter, obtaining a final video bit-stream and sending the final video bit-stream to the remote client device; wherein the filter parameter comprises;
a priority threshold used in truncating the bit-stream according to priorities of bit-stream packets in the video bit-stream;
the priority threshold is calculated according to the device capabilities and the network conditions of the remote client device and parameter information stored in a storing unit;
the parameter information is a cyclic queue of information of all bit-stream packets in the latest image group;wherein the information of the bit-stream packet comprises a priority, a time domain level, a spatial domain level and a bit rate increment;
the method further comprises;
when encoding each image frame, adding information of all bit-stream packets corresponding to the image into the cyclic queue;wherein the bit rate increment is Rk=lk×
Fpsmax/GopSize, lk represents the length of a bit-stream packet k, Fpsmax represents a frame rate corresponding to the maximum time domain level, GopSize represents the number of images included in one image group.
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Specification