Moving picture coding control method, moving picture coding device

A moving image, coding control technology, applied in the field of moving image coding, can solve the problem of increased computation

Active Publication Date: 2015-11-25
NIPPON TELEGRAPH & TELEPHONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since all frames of the input video need to be re-encoded in this method, there is a problem that the amount of calculation increases

Method used

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  • Moving picture coding control method, moving picture coding device
  • Moving picture coding control method, moving picture coding device
  • Moving picture coding control method, moving picture coding device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0098] image 3 is a flowchart showing the processing of the moving picture coding control method according to the first embodiment of the present invention.

[0099] First, the image next to the encoded image in the input video signal is set as an encoding target (step S101 ). The input image set as an encoding target is encoded using H.264 and other predetermined encoding methods (step S102 ). Whether or not CPB underflow has occurred is determined based on the encoding of the input image (step S103 ), and if CPB underflow has occurred, the process proceeds to step S107 . In addition, whether or not CPB underflow has occurred can be determined by a method used in, for example, the H.264 standard.

[0100] If the CPB underflow does not occur, it is determined whether the encoding of the final image is completed (step S104 ), and if the encoding of the final image is also completed, the encoding process is terminated.

[0101] If not, it is determined whether or not the enc...

no. 2 example

[0140] Next, a second embodiment of the present invention will be described. Figure 9 is a flowchart showing the processing of the moving picture coding control method according to the second embodiment of the present invention.

[0141] First, the image next to the encoded image in the input video signal is set as an encoding target (step S201 ). The input image set as an encoding target is encoded using H.264 and other predetermined encoding methods (step S202 ). Whether or not CPB underflow has occurred is determined from the encoding of the input image (step S203 ), and if CPB underflow has occurred, the process proceeds to step S208 . In addition, whether or not CPB underflow has occurred can be determined by a method used in, for example, the H.264 standard.

[0142] If CPB underflow does not occur, it is determined whether the encoding of the final image is completed (step S204 ), and if the encoding of the final image is also completed, the encoding process is termi...

no. 3 example

[0182] Next, a third embodiment of the present invention will be described. Figure 12 is a flowchart showing the processing of the moving picture encoding control method according to the third embodiment of the present invention.

[0183] First, the image next to the encoded image in the input video signal is set as an encoding target (step S301 ). The input image set as an encoding target is encoded using H.264 and other predetermined encoding methods (step S302 ). Whether or not CPB underflow has occurred is determined from the encoding of the input image (step S303 ), and if CPB underflow has occurred, the process proceeds to step S308 . In addition, whether or not CPB underflow has occurred can be determined by a method used in, for example, the H.264 standard.

[0184] If CPB underflow does not occur, it is determined whether the encoding of the final image is completed (step S304 ), and if the encoding of the final image is also completed, the encoding process is term...

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Abstract

In a video encoding control method of the present invention, each picture is encoded in units of encoding-order picture groups such as GOPs, and when CPB underflow has occurred, an encoding parameter such as a quantization parameter and filter strength of a pre-filter is changed in such a manner that a generated bit rate is reduced, and an encoding-order picture group that is being encoded is re-encoded from its first picture using the changed encoding parameter.

Description

technical field [0001] The present invention relates to an activity for encoding a video signal so that the collapse of a virtual buffer such as a coded picture buffer (CPB: Coded Picture Buffer) in a virtual decoder (decoder) does not occur, and the degradation of image quality does not increase. Image coding technology. [0002] This application is based on Japanese Patent Application No. 2010-106851, Japanese Patent Application No. 2010-106852, Japanese Patent Application No. 2010-106853, Japanese Patent Application No. 2010-106854 and Japanese Patent Application No. 2010- No. 106855 claims priority, the contents of which are hereby incorporated by reference. Background technique [0003] In the encoding of video signals, it is necessary to encode in such a way as not to crash the decoder. In the H.264 encoding scheme, a virtual decoder HRD (HypotheticalReferenceDecoder: virtual reference decoder) that models a decoder is specified. The encoder for H.264 needs to encod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/172H04N19/15H04N19/61H04N19/114H04N19/117H04N19/124H04N19/132H04N19/152H04N19/177H04N19/194H04N19/80H04N19/85
CPCH04N19/85H04N19/114H04N19/117H04N19/124H04N19/132H04N19/15H04N19/152H04N19/172H04N19/177H04N19/194H04N19/61H04N19/80
Inventor 北原正树清水淳小野尚纪
Owner NIPPON TELEGRAPH & TELEPHONE CORP
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