Embedded HD network video recorder

Abstract

The invention provides an embedded HD network video recorder. The embedded HD network video recorder comprises a code stream receiving unit, a snapshotting unit, a recording unit, a previewing unit, a memory managing unit, a playback unit and a file export unit; the code stream unit is respectively connected with the snapshotting unit, the recording unit and the previewing unit; the snapshotting unit and the recording unit are connected with the memory managing unit; the memory managing unit is respectively connected with the playback unit and the file export unit; the code stream receiving unit is used for acquiring an audio / video code stream and extracting the data frame of each audio / video code at each frame from the audio / video code stream; the snapshotting unit is used for caching a key frame extracted from the audio / video code stream and directly storing the key frame data cached at present after receiving the snapshotting request. With the adoption of the embedded HD network video recorder, the audio / video data are avoided real-time decoding during snapshotting, so that the snapshotting efficiency is greatly increased, and the continuous snapshotting can be performed while a large-route HD network camera is supported to connect.

Description

technical field [0001] The invention relates to a high-definition network video recorder, in particular to an embedded high-definition network video recorder. Background technique [0002] In the prior art, when a video recorder is used to capture a picture, one solution is that the video recorder receives the video code stream, decodes it to obtain a frame of original image data, and then converts it into a picture file for storage. In this way, both decoding the high-definition video and converting the picture file require Occupies more processor resources of the video recorder, and the decoding display of the surveillance video has already occupied most of the processor resources, so it cannot support a large number of high-definition videos at the same time continuous capture; another solution is that the video recorder sends a capture request to the network camera, The camera captures pictures and sends the picture files to the video recorder for storage. This method re...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, when a video recorder is used to capture a picture, one solution is that the video recorder receives the video code stream, decodes it to obtain a frame of original image data, and then converts it into a picture file for storage. In this way, both decoding the high-definition video and converting the picture file require Occupies more processor resources of the video recorder, and the decoding display of the surveillance video has already occupied most of the processor resources, so it cannot support a large number of high-definition videos at the same time continuous capture; another solution is that the video recorder sends a capture request to the network camera, The camera captures pictures and sends the picture files to the video recorder for storage. This method requires the network protocol of the network camera to support the capture command, and the capture time interval, picture quality and file format are also limited by the implementation of the network camera.

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