Digital video image frame reducing storage method

A digital video and video image technology, applied in image communication, TV, color TV, etc., can solve the problem of high processing speed requirements of microprocessors, and achieve the effect of reduced processing speed requirements and simple implementation.

Inactive Publication Date: 2005-11-09
CHENGDU NAWEITE SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, when the digital video surveillance system retrieves and displays the stored images, it needs to decode the MPEG images. Due to the high complexity of the MPEG algorith

Method used

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Examples

Experimental program
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Embodiment Construction

[0013] The present invention will be further described below in conjunction with specific embodiment:

[0014] MPEG image coding is divided into I frame, P frame and B frame, in which I frame adopts intra-frame coding technology, only uses the image information of this frame for coding, and the decoding of I frame does not need the code stream of other frames. P-frame is a kind of forward predictive coding, which uses the general statistical information of adjacent frames for prediction, that is, it takes into account the motion characteristics, and encodes the difference between the image (I or P frame) of the current frame and the previous frame . The P frame cannot exist alone, and the decoding of the P frame needs the image (I or P frame) code stream of the previous frame to proceed. B frame is bidirectional interframe coding, which extracts data from the previous and subsequent I frame or P frame, B frame uses the previous reference frame (I frame or P frame) and the nex...

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Abstract

This invention discloses a digital video image frame-reduction storage method including the following steps: On the basis of compatible known MPEG standard, MPEG standard is applied to encode digital video images to form a basic MPEG video flow, then to reduce frames to every GDP set of said flow and store the frame-reduced MPEG digital video image in a video flow-like document. Advantage: when storing MPEG video images, it can store and display high quality of MPEG images in the limited space of hard disks and at low process speed of microprocessors by reducing or eliminating P, B or partial B frames of each GOP set.

Description

[0001] Field [0002] The invention relates to a digital video image storage method, in particular to a digital video image frame reduction storage method. Background technique [0003] After the analog video signal is converted into a digital video signal, due to the large amount of data, it is not suitable for storage and real-time transmission, so it needs to be encoded and compressed. MPEG (Moving Pictures Experts Group) is an international standard for moving image compression. The International Organization for Standardization Moving Picture Experts Group (MPEG) has successively formulated standards such as MPEG-1, MPEG-2 and MPEG-4. Among them, MPEG-1 is used to speed up the transmission of images in CD-ROMs, which can transfer 221Mbps NTSC Images are compressed to 1.2Mbps with a compression ratio of 200:1. MPEG-2 is used for broadband transmission of images, and the image quality reaches the standard of TV broadcasting and even HDTV. It is the compression method of di...

Claims

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Application Information

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IPC IPC(8): H04N5/91
Inventor 黄乐讯
Owner CHENGDU NAWEITE SCI & TECH DEV
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