3D Video Transmission via Macroblock Comparison in H.263
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Solution Overview
Problem
The existing H.263 video communication protocol is inadequate for reliably and effectively sending 3D videos due to the large data requirements, which exceed the available bandwidth, especially in wireless networks, leading to packet loss and image distortion.
Innovation Solution
A method and system that compare acquired first and second video images to identify macro blocks different between them, sending only the first video image and these macro blocks as an I-frame, reducing data transmission by omitting identical macro blocks and using identical motion vectors for P-frames, thereby optimizing bandwidth usage within the existing H.263 protocol.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If 3D video is sent using existing H.263 protocol, then video transmission is attempted, but the large data amount exceeds available bandwidth causing packet loss and image distortion
Solution Approach 1:
The patent segments the 3D video data into two components: I-frames (independent frames) and P-frames (predicted frames). By dividing the video stream into these segments, the system can transmit only the essential difference information in P-frames, significantly reducing the overall data amount while maintaining video quality and transmission reliability
Solution Approach 2:
The patent extracts and transmits only the macro blocks that differ between frames (difference information) rather than transmitting complete frames repeatedly. This extraction of essential changing information reduces bandwidth consumption while preserving the ability to reconstruct the full 3D video at the receiver end
2Quantity of substance
If complete 3D video frames are transmitted, then video quality is maintained, but bandwidth consumption exceeds available network capacity
Solution Approach 1:
The patent performs preliminary comparison and identification of difference macro blocks before transmission. By pre-processing the video data to identify what actually changes between frames, the system prepares only the necessary information for transmission, reducing bandwidth consumption while ensuring no essential video information is lost
Solution Approach 2:
The patent uses reference frames (I-frames) as templates that can be copied and reused for multiple P-frames. Instead of transmitting complete video information repeatedly, the system transmits the base I-frame once and then only the differences for subsequent frames, dramatically reducing bandwidth usage while maintaining information completeness
Data Source
AI summary
A video image sending method, device and system is provided, which is adapted to send a 3D video image between video players. An acquired first video image is compared with an acquired second video image to find out macro blocks in the second video image which are different from those in the first video image; and the first video image and the macro blocks are sent as an I-frame video image to a network side.