Video Packet Retransmission Based on Receiver Error Concealment
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Solution Overview
Problem
Existing video streaming technologies face challenges in maintaining quality of service (QoS) due to increased load on QoS resources from error resistance processing, particularly when multiple streaming video data items are transmitted, leading to potential issues with packet retransmission and network congestion.
Innovation Solution
A system where a transmission apparatus determines whether to retransmit packets based on the error concealment function of reception apparatuses, using information about the EC function and packet loss thresholds to selectively manage retransmissions, thereby distributing control loads and avoiding network deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packet retransmission is performed to maintain video quality, then video quality is improved, but network bandwidth is deteriorated due to increased load
Solution Approach 1:
The patent applies local quality by differentiating retransmission strategies based on the specific capabilities of each reception apparatus. Transmission apparatuses selectively retransmit packets only to reception apparatuses that lack error concealment functions, rather than performing blanket retransmissions to all receivers. This localized approach maintains video quality for vulnerable receivers while minimizing unnecessary network load from redundant retransmissions.
Solution Approach 2:
The patent implements partial action by performing retransmission only when necessary - specifically, only when the reception apparatus does not have error concealment capabilities. Instead of retransmitting to all receivers regardless of their capabilities, the system applies retransmission selectively to the extent needed, avoiding excessive retransmission actions that would worsen network bandwidth conditions.
2Reliability
If error resistance processing is performed at each point in the system, then local error protection is improved, but the load on QoS resources in the system as a whole increases
Solution Approach 1:
The patent enables reception apparatuses with error concealment functions to serve themselves by independently handling packet errors without requiring retransmission assistance from the transmission apparatus. These capable receivers autonomously conceal errors using their EC functions, eliminating the need for them to burden the QoS resources with retransmission requests. Only receivers without self-service EC capabilities rely on the transmission apparatus for retransmission support.
Solution Approach 2:
The system applies different error protection strategies locally at each reception apparatus based on its capabilities. Receivers with EC functions use local error concealment processing, while receivers without EC functions receive retransmitted packets from the transmission apparatus. This differentiated local approach optimizes the overall QoS resource utilization by matching protection mechanisms to receiver capabilities.
3Adaptability or versatility
If multiple streaming video data items are transmitted simultaneously, then service diversity is improved, but troubles occur due to increased QoS resource consumption
Solution Approach 1:
The patent applies partial action by enabling multiple streaming services to coexist with reduced retransmission overhead. By determining whether each reception apparatus has error concealment capabilities and selectively applying retransmission only where necessary, the system supports multiple streaming video data items without excessive QoS resource consumption that would otherwise cause system instability.
Data Source
AI summary
A transmission apparatus receives information used to identify data unsuccessfully received by a reception apparatus. Then, the transmission apparatus determines whether the data corresponding to the received identification information should be retransmitted based on whether the reception apparatus has a function of displaying the display area of the data corresponding to the identification information by using data having the display area corresponding to the data corresponding to the identification information.