Method and device for decoding image sequence by utilizing virtual image picture rearregement

Abstract

In the image display system, under the some conditions the image display system also has need of continuously displaying picture stored in same buffer memory. In order to resolve the above-mentioned problem, it utilizes the insertion of virtual image picture to solve the problem of that the image decode order can be rearranged into the image display order so as to attain the lowest hardware and software requirements.

Description

technical field [0001] The invention relates to an image display system, in particular to the arrangement of compressed image decoding and display sequence in the image display system. Background technique [0002] The CCITT / ISO (International Telegraph and Telephone Consultative Committee / International Organization for Standardization) organization has formulated standard formats for compression and decompression algorithms for still and moving digital images, including JPEG (Joint Photo Coding Expert Group), MPEG (Motion Picture Expert Group) ), H.261, etc. These standards have been widely used in video conferencing, VCD (video disc), DVD (digital video disc), video, on-demand video satellite image transmission, etc., as well as other applications that require the transmission of digital video images. The MPEG standard is formulated by the MPEG committee under the ISO, and its format includes animation, sound, and coding representation methods that combine the two. [000...

AI Technical Summary

Problems solved by technology

[0008] The known technology adopts the practice of decoding twice, and stores it in the decoding buffer with a normal size after decoding once, and stores it in the display buffer with a reduced size after decoding once, but it must be retrieved in the image decoding sequence for the second decoding. This screen makes the decoding control method more complicated

Another known technique is to perform the scaling function with additional direct memory access (DMA) hardware, and transfer the image frame originally stored in the decoding buffer directly to the display buffer, but this will increase the hardware cost

Another known technique is to use the system's RISC to perform the work of reading the decoding buffer and writing the display buffer, but the RISC needs to spend more I / O cycles (I / O cycle), will reduce the performance of the reduced instruction set computer

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