Video Frame Group Reference Strategy for Transmission Delay
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Solution Overview
Problem
Current video transmission over the Internet is unreliable, leading to lag and delay in video playback due to packet loss and the inefficiency of using I frames, which results in poor real-time performance and increased bandwidth and network load.
Innovation Solution
The method involves generating consecutive frame groups with a long-term reference frame that uses a previous frame as a reference, replacing multiple I frames, and using predictive coding to transmit difference values and motion vectors, thereby reducing data size and transmission time while maintaining image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If I frames are used for video transmission, then video reliability is improved, but transmission delay increases and bandwidth consumption increases
Solution Approach 1:
The patent segments the video stream into frame groups with different reference frame types. Instead of uniformly using I frames for every frame group, the system divides frame groups into those that use I frames as reference and those that use P frames as reference, allowing selective use of compressed reference frames to reduce overall transmission delay while maintaining reliability through periodic I frames.
Solution Approach 2:
The patent changes the parameter of reference frame type from always using I frames to dynamically selecting between I frames and P frames based on frame group position. This parameter change allows the system to use compressed P frames (with smaller data size) for most frame groups while periodically inserting I frames for reliability, thereby reducing average transmission delay.
2Reliability
If I frames are used for video transmission, then video reliability is improved, but network load increases
Solution Approach 1:
The patent segments the video stream into frame groups with different reference frame types. Instead of uniformly using I frames for every frame group, the system divides frame groups into those that use I frames as reference and those that use P frames as reference, allowing selective use of compressed reference frames to reduce overall transmission delay while maintaining reliability through periodic I frames.
Solution Approach 2:
The patent changes the parameter of reference frame type from always using I frames to dynamically selecting between I frames and P frames based on frame group position. This parameter change allows the system to use compressed P frames (with smaller data size) for most frame groups while periodically inserting I frames for reliability, thereby reducing average transmission delay.
3Reliability
If multiple I frames are sent to ensure delivery, then video reliability is improved, but transmission time increases
Solution Approach 1:
The patent changes the parameter of reference frame type from always using I frames to dynamically selecting between I frames and P frames based on frame group position. This parameter change allows the system to use compressed P frames (with smaller data size) for most frame groups while periodically inserting I frames for reliability, thereby reducing average transmission delay.
Solution Approach 2:
The patent uses P frames as compressed copies that reference previous frames. Instead of sending full I frames for every frame group, the system sends P frames that contain only the differences from previous frames, significantly reducing data size and transmission time while maintaining the ability to reconstruct the video stream.
4Loss of time
If P frames are used instead of I frames, then transmission delay is reduced, but reliability deteriorates due to reference dependency
Solution Approach 1:
The patent segments the video stream into frame groups with different reference frame types. Instead of uniformly using I frames for every frame group, the system divides frame groups into those that use I frames as reference and those that use P frames as reference, allowing selective use of compressed reference frames to reduce overall transmission delay while maintaining reliability through periodic I frames.
Solution Approach 2:
The patent changes the parameter of reference frame type from always using I frames to dynamically selecting between I frames and P frames based on frame group position. This parameter change allows the system to use compressed P frames (with smaller data size) for most frame groups while periodically inserting I frames for reliability, thereby reducing average transmission delay.
Data Source
AI summary
The video sending method includes: acquiring a video stream to be transmitted; generating consecutive frame groups from the video stream, wherein setting a first frame in the current frame group to be a long-term reference frame that uses a first frame in a previous frame group as a reference during generation of at least one of the current frame group, wherein the long-term reference frame is a predictive coded frame configured to transmit a difference and a motion vector obtained by performing a comparison against the first frame in the previous frame group, the current frame group is a frame group other than the first frame group; and sending the frame groups to a receiving terminal. The video receiving method comprises: receiving the frame groups sent by a sending terminal; and restoring the frame groups to obtain the transmitted video stream.