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数据缓冲区
The combination of the two can achieve rapid, accurate, and complete video storage, avoiding loss of video data due to the condition that the first frame of the data buffer zone is a reference object.
Figure 3 is a flow diagram of video data storage processes in the prior art. As seen in the figure, during the process of video data storage, the storage equipment opens a data buffer zone used for temporarily storing the latest segment of video encoding data.
Another approach to achieving the effect is as shown in Figure 9. The data buffer zone is divided into multiple sub-zones, among which two sub-zones are configured to buffer I Frames, while other sub-zones are configured to buffer an R Frame and a P Frame with reference relation to the R Frame.
The sub-zones of the data buffer zone buffering the two I Frames respectively store the current I Frame and the earlier I Frame.
数据缓冲区的两个缓存I帧的子分区分别存储有当前I帧和较早I帧。
The sub-zones of the data buffer zone buffering the two I Frames respectively store the current I Frame and the earlier I Frame. When an I Frame is acquired in a data buffering process, the earlier I Frame is replaced.
If I Frames exist, the I Frames are acquired to the data buffer zone.
如果I帧存在的话,将该I帧采集到数据缓冲区中。
In State 1, Rn-1 and a subsequent P Frame thereof have already been buffered, and are stored to the storage fragment at this point, and at the same time Rn and the subsequent P Frames thereof are buffered to the data buffer zone.
In the embodiment, multiple data buffer zones can be configured. The data in data buffer zones are to the greatest degree possible near to the largest value of the data buffer zone, and the data of the data buffer zone is stored to the storage fragment.
Under random state, it is possible the P Frame quantity following an R Frame could be relatively large. In order to guarantee that all subsequent P Frames can be buffered to the data buffer zone, the storage space of the data buffer zone is configured to be sufficiently large.
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