Video Target Rate Adaptation for Bursty Congestion
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Solution Overview
Problem
Existing video target rate adaptation methods are inadequate in responding to bursty congestion peaks and recovering from temporary congestions, leading to poor video quality due to insensitive average aggregate maximum capacity and slow recovery of target rates.
Innovation Solution
A method and device for adapting the target rate of a video signal by measuring indicators such as transport delay and packet loss rate at the receiver, calculating a new target rate based on current and reference values, and transmitting this new rate back to the provider for adjustment, enabling faster response to congestion and improved video quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If video target rate adaptation methods are based on average aggregate maximum capacity, then the system can maintain a relatively simple control mechanism, but the method becomes insensitive to temporary congestions caused by statistical multiplexing of variable rate streams
Solution Approach 1:
The patent implements dynamic target rate adaptation by continuously adjusting the target bit rate based on real-time congestion detection. The system transitions from static average capacity assumptions to dynamic response, where the target rate is modified according to detected congestion conditions, enabling the system to respond to temporary congestions while maintaining operational simplicity.
Solution Approach 2:
The patent employs feedback mechanisms where the receiver monitors congestion conditions and sends signals back to the transmitter to adjust the target rate. This feedback loop enables the system to detect temporary congestions and adapt accordingly, resolving the insensitivity issue while maintaining reasonable system complexity through standardized feedback protocols.
2Reliability
If the target rate is reduced to avoid packet losses during congestion, then packet loss decreases, but the video quality degrades due to prolonged low target rate even after congestion resolves
Solution Approach 1:
The patent applies preliminary action by detecting congestion conditions before they cause significant packet losses. The system proactively adjusts the target rate in anticipation of congestion impacts, and more importantly, proactively recovers the target rate before quality degradation becomes permanent. This preliminary response mechanism prevents the prolonged low target rate issue while maintaining low packet loss rates.
Solution Approach 2:
The patent implements dynamic target rate adjustment that responds to congestion conditions in real-time. The target rate is not fixed but continuously adapts based on network conditions, allowing the system to quickly recover from congestion events and maintain high video quality without prolonged degradation, while still preventing packet losses during active congestion periods.
3Reliability
If the target rate recovers slowly after congestion, then the system avoids premature rate increase that could cause packet losses, but the video encoder uses a low target rate unnecessarily degrading perceived quality
Solution Approach 1:
The patent applies preliminary action by detecting when congestion has resolved and proactively initiating target rate recovery before the low rate becomes permanently established. The system monitors congestion conditions continuously and triggers rate recovery in advance, preventing the unnecessary quality degradation while avoiding premature increases that would cause packet losses.
Solution Approach 2:
The patent implements parameter changes in the target rate based on detected congestion conditions. The system dynamically modifies the target bit rate parameter in response to network conditions, enabling fast recovery to high quality video transmission after congestion resolves, while maintaining reliability during active congestion periods through coordinated parameter adjustment.
Data Source
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AI summary
A particle separator with a centrifugal separator for separation of particles from a gas, said particles having a higher density than the gas, and said separator comprising: a rotor (24), a driving device (8) for rotation of the rotor (24) about s rotation axis (A), a housing (4) with a wall (1) that surrounds the rotor (24) a chamber ( 19) defined between an outer periphery of the rotor (24) and an inner periphery of the wall (1) of the housing (4), an outlet (15) of the rotor (24), a separating unit ( 13 with a plurality of separating passages (22), at least one inlet (5) for introduction of unclean gas into said chamber (19), said inlet (5) being situated in the wall (1) of said housing (4), wherein the centrifugal separator of the particle separator is arranged for a counter flow separation of dry and humid particles from the gas. The inlet (5) for introduction of unclean gas into the chamber (19) is arranged as a tangential cyclone inlet.