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Editing apparatus, bit rate control method, and bit rate control program

A rate control and rate technology, applied in the field of non-linear editing equipment, can solve the problems of image quality degradation, video data cannot be completely restored, and occupying a lot of time and resources.

Inactive Publication Date: 2005-02-09
SONY CORP
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  • Abstract
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Problems solved by technology

[0005] The disadvantage of this non-linear editing device is that in the case where the video material is returned to an uncompressed state by decoding, the original video data cannot be completely restored, because MPEG is an irreversible compression method, and if the restored data is Encoding degrades picture quality
Therefore, there is a weakness: decoding and encoding takes a lot of time and resources, such as the need for decoders and encoders

Method used

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  • Editing apparatus, bit rate control method, and bit rate control program
  • Editing apparatus, bit rate control method, and bit rate control program
  • Editing apparatus, bit rate control method, and bit rate control program

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Embodiment Construction

[0017] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0018] (1) Configuration of bit rate control circuit

[0019] refer to figure 1 , reference numeral 1 denotes a bit rate control circuit of the present invention to be mounted on an editing device. This bit rate control circuit is designed to output video material S1 containing MPEG data with different compression rates at the material bit rate of video material S1, and the material S1 is processed by decoder 3 and encoder 4 at the desired compression rate. Output video material S1 after compressing and encoding, or by inserting meaningless "0" data as empty data by the null data inserting unit 5 according to the result determined by the bit rate determining unit 2 under the output bit rate of SDTI-CP Output material S1.

[0020] like figure 2 As shown, as the data structure of video material S1 (S1a, S1b, S1c, S1d, ...), video material S1a, S1b, S1...

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Abstract

An editing apparatus, and a bit rate control method and program are capable of converting a material bit rate of video material to a desired output bit rate without picture quality deterioration in a short time and simply. According to this invention, a bit rate determination unit 2 compares a material bit rate of entered video material S1 to be edited with an output bit rate. In a case where the output bit rate is larger than the material bit rate, the null data insertion unit 5 adds meaningless data to the material data of the video material to convert the material bit rate to the output bit rate. As a result, the material data of the video material S1 can be output without picture quality deterioration with the material bit rate converted to the output bit rate.

Description

technical field [0001] The present invention relates to editing equipment, bit rate control method and bit rate control program, more specifically, the present invention is suitable for being applied to non-linear editing equipment, is used for the material bit rate conversion of Motion Picture Experts Group (MPEG)-IMX video material to the desired output bit rate to output video. Background technique [0002] A conventional non-linear editing device is described in, for example, the Serial Data Transport Interface-Content Packet (SDTI-CP) standard (for example, see Patent Document 1 Japanese Patent Application Laid-Open No. 2000-228652 (FIG. 7, FIG. 8, and FIG. 9)). Real-time transfer (simultaneous transfer) of video material containing MPEG (IMX) data with different compression rates at a defined output bit rate. [0003] In order to transform the material bit rate of the video material to match the output bit rate of SDTI-CP, the nonlinear editing device should decode th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/222H04J3/00H04N5/91H04N7/24H04N19/00H04N19/40H04N19/48H04N19/70H04N19/85H04N21/236
CPCH04N21/2389H04N19/00781H04N21/4385H04N19/00284H04N19/0006H04N19/00472H04N19/00169H04N21/23611H04N21/23602G11B27/031G11B27/036H04N19/115H04N19/146H04N19/177H04N19/40H04N19/61
Inventor 山本俊昭杉江由行
Owner SONY CORP
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