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Video encoding device, video transcoding device, video encoding method, video transcoding method and video stream transmission system

A technology for dynamic images and encoding devices, which is applied in image communication, digital video signal modification, selective content distribution, etc., and can solve problems such as low efficiency, reduced overall regional bit stream compression efficiency, and more locations for cutting off references.

Inactive Publication Date: 2016-04-20
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] However, in method 2, since encoded data and encoding parameters are extracted in units of slices, when the partial area designated by the user spans multiple slices or when the slice size is larger than the partial area, etc., a large number of displays are generated. Partial region bitstream for regions not needed, not efficient
[0020] When the slice size is reduced in order to improve the generation efficiency of the partial area bit stream, there is a problem that the compression efficiency of the entire area bit stream decreases because the number of positions for cutting off references increases.

Method used

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  • Video encoding device, video transcoding device, video encoding method, video transcoding method and video stream transmission system
  • Video encoding device, video transcoding device, video encoding method, video transcoding method and video stream transmission system
  • Video encoding device, video transcoding device, video encoding method, video transcoding method and video stream transmission system

Examples

Experimental program
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Embodiment approach 1

[0050] In this first embodiment, a moving picture encoding device is described in which a maximum value of a motion vector or a limit on the number of frames between random access points is set when inter-frame prediction is performed so that the pixel value between random access points Coding is performed so that the spread range of the information is within a certain range, and the overall area bit stream is generated, and information indicating the limit value of the maximum value of the motion vector or the limit value of the number of frames between random access points is multiplexed as hint information into the bitstream of the general area.

[0051] In addition, a video transcoding device that decodes coded data of the whole area based on the bit stream of the whole area generated by the above-mentioned video encoding device and refers to hint information multiplexed in the bit stream of the whole area will be described. , from the encoding data and encoding parameters...

Embodiment approach 2

[0278] In this second embodiment, an example in which the video encoding device and the video transcoding device described in the first embodiment are applied to a system different from the first embodiment will be described.

[0279] Figure 11 It is a configuration diagram showing a system to which a video encoding device and a video transcoding device according to Embodiment 2 of the present invention are applied.

[0280] exist Figure 11 Among them, the dynamic image encoding device 51 has the same figure 1 Functions equivalent to the moving image encoding device 1. The video encoding device 51 outputs the generated total area stream to the video distribution device 53 or the memory 52 .

[0281] The moving image distributing device 53 is composed of a total area stream decoding unit 54, a partial area transcoding unit 55, and a distribution control unit 56, and has the following functions: The display area specifying information input by 50-1 to 50-N generates a part...

Embodiment approach 3

[0296] In this third embodiment, a video streaming system for more effectively applying the video encoding device and the video transcoding device described in the first and second embodiments will be described.

[0297] In Embodiment 3, it is assumed that the entire area image is divided into sub-picture units such as slices or slices.

[0298] Figure 12 It is an explanatory diagram showing an example of dividing the total area image into six sub-pictures (Sub-pic).

[0299] Figure 13 is a configuration diagram showing a moving image streaming system according to Embodiment 3 of the present invention, in Figure 13 in, because with figure 1 The same reference numerals denote the same or corresponding parts, and therefore descriptions thereof are omitted.

[0300] The video coding device 1 is the video coding device 1 shown in the first embodiment (or the video coding device 51 shown in the second embodiment), and generates a bit stream in which the hint information is m...

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Abstract

A variable length encoding unit (23) multiplexes hint information into an all-region bitstream, the hint information including motion vector limit information that indicates the maximum searchable range of the motion vector, GOP size limit information that indicates the maximum value of a GOP size which is the number of pictures belonging to the GOP, and reference structure designation information that indicates pictures which are referenced when decoding the pictures that belong to the GOP. Due to the foregoing, without causing a drop in the compression efficiency of an all-region bitstream, an all-region bitstream can be generated, such bitstream being appropriate for generating an efficient partial region bitstream using low computation.

Description

technical field [0001] The present invention relates to an image encoding device and an image encoding method for compressing and encoding an image to generate encoded data, and a dynamic image transcoding device and a dynamic image transcoding method for generating other encoded data having different properties from the encoded data generated by the image encoding device and a moving image streaming system for transmitting and receiving encoded data generated by an image encoding device. Background technique [0002] At present, with the progress of imaging equipment, display equipment, compression coding technology, transmission technology, etc., UHD (Ultra HD) having a resolution (for example, resolution of 4K, 8K, etc.) exceeding HD (High Definition: high definition) is being studied. -High Definition: ultra-high-definition) distribution service of ultra-high-definition images. [0003] In ultra-high-definition images, because the amount of image information is huge, im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/46H04N19/40
CPCH04N19/46H04N19/40H04N21/2343H04N21/236H04N19/196H04N19/61H04N19/107H04N19/114H04N19/174H04N19/167H04N21/4728H04N19/105H04N19/55H04N19/57H04N19/58H04N19/463H04N19/52H04N19/573H04N19/593H04N19/91
Inventor 服部亮史守屋芳美峯泽彰宫泽一之关口俊一
Owner MITSUBISHI ELECTRIC CORP