Method and device for controlling call of video telephone
A technology for call control and video telephony, applied in other decoding technologies, speech analysis, instruments, etc., can solve the problems of not being able to know the quality of the underlying transmission channel, poor voice and image, and not being able to know the quality of the underlying transmission in a timely and correct manner. Achieve the effect of improving the quality of user call experience and improving fluency
Active Publication Date: 2011-04-20
LEADCORE TECH
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[0006] However, the inventors of the present invention have found that only detecting the bit error rate of voice and video through the 324 video telephony protocol stack cannot timely and correctly understand the transmission quality of the bottom layer, and the voice and image are very poor for a period of time.
Moreover, when the underlying transmission quality cannot meet the requirements of video transmission, hanging up the video call directly gives the user a bad feeling
Video fallback also has many disadvantages. When the video is fallback, due to the poor transmission quality of the bottom layer and high bit error rate, the quality of ordinary voice is relatively poor; in addition, because the upper layer 324 video telephony protocol stack cannot Knowing the quality of the underlying transmission channel, when the underlying transmission quality is restored to meet the requirements of video transmission, the video call cannot be automatically restored, requiring the user to hang up the phone and initiate a call again, which is very inconvenient
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[0041]In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.
[0042] The first embodiment of the present invention relates to a video phone call control method.
[0043] In this embodiment, a channel quality indication message is added between the 3G high-layer protocol stack and the 3G 324 protocol stack, such as figure 1 shown. After the video call is established and during the video call, the 3G high-level protocol stack regularly reports the transmission quality of the underlying channel to the 3G 324 protocol stack, mainly including the block error rate (Block Error Rate, BLER for short) of the transmission channel. The 324 protocol stack smoothes the BLER reported by the 3G high-level protocol. When the BLER reaches a certain threshold, it is considered that the underlying transmission channe...
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The invention discloses a method and a device for controlling a call of a video telephone, which relates to the technology of controlling the video telephone. In the method, an original 64kbps bottom-layer transmission channel for transmitting the video telephone is kept when the channel is deteriorated, and voice data protected by redundancy coding and a control signaling are protected on the relatively wide transmission channel which has a certain bit error rate; redundancy protection is performed on the voice data, so that the transmission quality is relatively high; therefore, relatively higher voice quality can be guaranteed. Simultaneously, after a wireless environment is restored, video call is automatically recovered, and the fluency and experience quality of the call between users are improved.
Description
technical field [0001] The invention relates to a video phone control technology, in particular to a video phone call control method and device thereof. Background technique [0002] With the increasing development of computer networks, network-based multimedia transmission has become more and more popular, and people's requirements for multimedia communication content are increasing day by day. People are no longer satisfied with single, passive traditional media entertainment methods, but what they really need is individuality. Especially with the further development of mobile communication network technology, mobile multimedia has increasingly shown its extensive and more mature user awareness and acceptance in the future. [0003] Mobile multimedia is to provide rich and colorful multimedia application services in the field of mobile communication and broadband streaming, which is a mobile value-added service provided on the basis of mobile communication. As an importan...
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IPC IPC(8): H04N7/14G10L19/00H03M13/45
Inventor 王海森
Owner LEADCORE TECH