Device and method for generating a transmit frame
A technology for sending frames and equipment, which is applied in signal transmission and communication fields, can solve problems such as high input rate and high distortion, and achieve the effect of simplifying transmission scheme, improving quality and low cost
Inactive Publication Date: 2007-07-11
NTT DOCOMO INC
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Problems solved by technology
[0002] Streaming video over the Internet—or any other type of network where resources are shared by many users—always faces the problem that at one or more points along the path, the input rate at a network node may be higher than the output rate
However, this drop decision does not take into account many simultaneous video streams in a rate-distortion optimal manner, so that certain video streams suffer from much higher distortion than others
Method used
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[0030] Fig. 1 shows a block diagram of an inventive device for generating a transmission frame from an information signal. As shown in FIG. 1 , the information signal comprises, by way of example only, a first frame of information 101 and a second frame of information 103 arranged in time.
[0031] The device comprises a provider 105 for providing reconstruction distortion values, wherein the provider 105 is coupled to a unit 107 for inserting the first information frame or the second information frame into the transmission frame. The unit 107 for interpolation comprises an input for receiving information signals and an output for providing frames for transmission.
[0032]Generally speaking, the unit 107 for inserting can be configured to insert N information frames out of M information frames into the transmission frame, where M is a number greater than or equal to N, and where M indicates that the information signal contains The number of information frames.
[0033] The ...
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An apparatus for generating a transmit frame from an information signal, the information signal comprising a first information frame and a second information frame, comprises a provider (105) for providing a first reconstruction distortion value indicating a reconstruction distortion when replacing the first information frame by a replacement frame, and for providing a second reconstruction distortion value indicating a reconstruction distortion when replacing the second information frame by a replacement frame, means (107) for introducing either the first information frame or the second information frame into the transmit frame in dependence on the first reconstruction distortion value or in dependence on the second reconstruction value. In accordance with the present invention, a rate-di3tortion optimized rate reduction can be achieved.
Description
technical field [0001] The present invention belongs to the field of communications, and in particular to the field of signal transmission over a communications network such as the Internet. Background technique [0002] Video streaming on the Internet—or any other type of network where resources are shared by many users—always faces the problem that at one or more points along the path, the input rate at a network node may be higher than the output rate. This leads to an ever-increasing buffer fullness of the node and eventually to packet loss. For video signals, if more traffic arrivals than the output link can be supported, the video data must be transcoded to a lower rate, or video packets must be dropped. [0003] Transcoding is computationally expensive and random dropping has a negative impact on video quality. Scalable video provides the opportunity to drop less important parts of the video bitstream first, which results in a modest degradation as traffic grows. ...
Claims
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IPC IPC(8): H04N7/24H04N7/26H04N7/46H04N19/895
CPCH04N19/00939H04N19/00054H04N19/00175H04N19/00751H04N19/00127H04N19/00351H04N19/00193H04N19/00266H04N21/2662H04N19/114H04N19/132H04N19/147H04N19/152H04N19/172H04N19/19H04N19/587H04N19/895
Inventor 沃尔夫冈·科勒尔艾克哈尔德·斯坦贝克韦图
Owner NTT DOCOMO INC