Video Recorder Ring Buffer Memory Management
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Solution Overview
Problem
Network video recorders face challenges in efficiently transmitting moving picture data to multiple client computers while minimizing the amount of data stored in volatile memory.
Innovation Solution
A method and apparatus for a video recorder that uses ring buffers with circular loading positions in volatile memory to manage and transmit image data from multiple cameras to client devices, allowing for efficient data transmission and reduction of volatile memory usage by setting specific loading positions and reference times for data storage and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frame data is stored in volatile memory for buffering to enable transmission to multiple client computers, then transmission effectiveness is improved, but the amount of data stored in volatile memory increases
Solution Approach 1:
The volatile memory is divided into multiple buffers, with each buffer corresponding to a specific camera channel. This segmentation allows the system to manage memory more efficiently by allocating specific buffer regions for different camera inputs, enabling simultaneous buffering of multiple video streams without requiring a single large continuous memory space.
Solution Approach 2:
The patent implements a circular buffer structure where the loading position dynamically moves through the buffer memory. When the buffer becomes full, the loading position wraps around to the beginning, creating a continuous, dynamic buffer that can continuously receive and transmit data without requiring additional memory allocation. This dynamic approach allows efficient memory utilization while maintaining continuous video stream buffering.
2Adaptability or versatility
If multiple buffers are set for multiple cameras to enable simultaneous data transmission, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent creates a universal buffer management structure where each camera channel is assigned a buffer with identical functional characteristics. All buffers use the same circular loading mechanism and data transmission protocol, allowing the system to handle any number of camera channels through a standardized, scalable architecture rather than requiring custom management for each camera.
Solution Approach 2:
The system dynamically assigns buffer loading positions and manages data flow across multiple buffers using a unified control mechanism. The circular buffer approach allows each buffer to independently cycle through its memory space while the control unit coordinates data transmission across all buffers, reducing the complexity of managing multiple simultaneous video streams.
Data Source
AI summary
A video recorder connected to a plurality of cameras and a plurality of client devices and a method of controlling the video recorder are provided. The method includes: setting a plurality of buffers, in a memory of the video recorder, corresponding to the plurality of cameras, respectively, and setting a plurality of positions in at least one buffer of the buffers for loading image data input from a corresponding camera of the plurality of cameras; loading, in the at least one buffer, the image data on given positions of the plurality of positions; and transmitting the loaded image data to the plurality of client devices so that each of the plurality of client devices receives the image data input from a same corresponding camera.


