Sending video data storage method for enhancing DDR2 bandwidth utilization rate based on FC-AV protocol

Abstract

The invention relates to a sending video data storage method for enhancing DDR2 bandwidth utilization rate based on an FC-AV protocol. The method comprises the following steps that 1) each logic bank of a DDR2 storage device is divided into multiple data buffer caches which are identical in size, and a row of video data of sending video data can be stored in each buffer cache; and 2) when each row of the sending video data are written in the DDR2 storage device, the sending video data are stored in the data buffer caches according to rotation of the sequence of the logic banks. The rows of videos are stored in the DDR2 according to rotation of the sequence of the logic banks so that the problem of the page conflict in simultaneous reading and writing of the data in the DDR2 can be solved, and bandwidth utilization rate of the DDR2 can be enhanced to the largest extent.

Description

technical field [0001] The invention belongs to computer hardware technology, and relates to a method for storing video data for sending and improving DDR2 bandwidth utilization based on FC-AV protocol. Background technique [0002] The FC-AV protocol defines the mapping method of video data to FC (Fiber Channel). When realizing the mapping of high-resolution video data to FC, it is generally necessary to use DDR2 memory as the cache of video data. When storing video data in DDR2 memory , the traditional storage method is to store the entire frame of video data sequentially by address increment, which results in the write operation of storing video data to DDR2 and the read operation of reading video data from DDR2. These two operations are for DDR2 most of the time. When the same logical bank of DDR2 is performed, when the read and write operations of DDR2 are performed simultaneously, according to the page management principle of DDR2, the bandwidth utilization rate of DDR...

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Problems solved by technology

[0002] The FC-AV protocol defines the mapping method of video data to FC (Fiber Channel). When realizing the mapping of high-resolution video data to FC, it is generally necessary to use DDR2 memory as the cache of video data. When storing video data in DDR2 memory , the traditional storage method is to store the entire frame of video data sequentially by address increment, which results in the write operation of storing video data to DDR2 and the read operation of reading video data from DDR2. These two operations are for DDR2 most of the time. When the same logical bank of DDR2 is performed, when the read and write operations of DDR2 are performed at the same time, according to the page management principle of DDR2, the bandwidth utilization rate of DDR2 is very low at this time

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