Video Packet Transceiver Bandwidth Management
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Solution Overview
Problem
Current 5G communication systems face challenges in maintaining maximum bandwidth and preventing video playback errors due to packet loss, especially in real-time services like video calls and streaming, where packet retransmission is limited by maximum bandwidth constraints.
Innovation Solution
An electronic device employs hierarchical P coding to generate non-reference frames, which are independent of other frames, and determines not to retransmit packets that have failed to be received, focusing on transmitting reference frames to ensure seamless video playback even under maximum bandwidth limitations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packet retransmission is performed to prevent video playback errors, then video quality is improved, but transmission bandwidth is exceeded
Solution Approach 1:
The patent segments video frames into reference frames and non-reference frames based on hierarchical P coding. Reference frames are transmitted with higher priority while non-reference frames are dropped when bandwidth is constrained. This segmentation allows the system to maintain essential video quality information within bandwidth limits while avoiding the need for retransmission that would exceed the bandwidth constraint.
Solution Approach 2:
The patent applies different transmission strategies to different types of frames based on their local importance. Reference frames, which are crucial for decoding other frames, are transmitted with high priority to maintain video quality. Non-reference frames, which do not affect overall video playback, are selectively dropped. This local quality differentiation resolves the contradiction by preserving essential information without wasting bandwidth on redundant data.
2Loss of information
If all packets are transmitted to ensure complete video data, then video completeness is improved, but transmission traffic exceeds maximum bandwidth
Solution Approach 1:
The patent applies partial action by transmitting only the essential reference frames and dropping non-reference frames when bandwidth is constrained. This partial transmission approach maintains sufficient video data completeness for seamless playback without exceeding the maximum bandwidth limit, avoiding the excessive action of transmitting all frames regardless of bandwidth constraints.
Solution Approach 2:
The patent changes the transmission parameter from transmitting all frames uniformly to selectively transmitting frames based on their type (reference vs. non-reference). This parameter change in transmission strategy allows the system to maintain video data completeness at the necessary level while reducing total transmission traffic to fit within maximum bandwidth constraints.
3Stability of the object's composition
If non-reference frames are transmitted to maintain video quality, then video playback smoothness is improved, but transmission efficiency is reduced
Solution Approach 1:
The patent applies local quality by differentiating the treatment of reference frames versus non-reference frames. Reference frames are transmitted to maintain video playback smoothness and continuity, while non-reference frames are dropped to improve transmission efficiency. This localized differentiation ensures that transmission resources are allocated to the most critical frames that actually impact playback quality.
Solution Approach 2:
The patent discards non-reference frames when bandwidth is constrained, accepting that some video quality information is lost. However, because non-reference frames do not affect the decoding of other frames, the core video content can still be recovered and played back smoothly using only the reference frames. This discarding approach improves transmission efficiency while maintaining adequate video quality.
Data Source
AI summary
An electronic device includes a NACK buffer configured to temporarily store first packets and second packets, and processing circuitry configured to generate a plurality of frames, which include reference frames depending on decoding of another frame and non-reference frames independent of decoding of another frame, based on hierarchical predictive (P) coding, generate the first packets forming the reference frames and the second packets forming the non-reference frames, based on the plurality of frames, transmit the first packets and the second packets to an external device, receive a NACK request indicating retransmission target packets that have failed to be received by the external device, determine to not retransmit at least some of the retransmission target packets corresponding to the NACK request.