Multistream Video Communication Staggered Access Points
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Solution Overview
Problem
Digital video systems experience latency between user requests and video information presentation due to various delays such as request processing and communication delays, which users prefer to minimize.
Innovation Solution
A system and method that transmit two video information streams simultaneously, where one is a time-delayed version of the other, allowing for identification and processing of the stream with the lowest latency for immediate presentation, using a video transmitter and receiver with modules for encoding, time delay, and access point alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a single video information stream is transmitted, then the system complexity is low, but the latency in presenting video information to the user increases
Solution Approach 1:
The patent segments the video information transmission by creating multiple parallel video information streams (first, second, and third streams) that are transmitted simultaneously over different transport streams. Each stream contains the same video information but with different access point timings, allowing the receiver to select the stream with the earliest access point to minimize latency.
Solution Approach 2:
The patent applies preliminary action by pre-positioning multiple access points at different temporal locations within the transmitted streams. The encoder is configured to place access points at specific timestamps (e.g., first access point at time T1, second access point at time T2) before transmission, so that when the streams are received, the receiver can immediately select and process the stream with the earliest accessible access point without waiting for processing delays.
2Loss of time
If multiple video information streams are transmitted simultaneously, then the latency is reduced, but the device complexity increases
Solution Approach 1:
The patent implements universality by designing the transmitter and receiver to handle multiple video streams through a unified architecture. The transmitter uses a single encoder configured to output multiple streams with different access point timings, and the receiver uses a single processor that can identify and switch between streams based on access point timing, making the system multi-functional without proportionally increasing complexity.
Solution Approach 2:
The patent uses copying by creating multiple copies of the same video information stream with different access point configurations. Instead of processing different video content, the system transmits identical video information encoded in multiple streams with access points positioned at different times, allowing the receiver to select the optimal copy based on timing requirements.
3Stability of the object's composition
If access points are temporally aligned in multiple streams, then the synchronization is improved, but the latency reduction capability is limited
Solution Approach 1:
The patent applies asymmetry by deliberately creating asymmetric access point timing across multiple streams. While the streams are synchronized in terms of overall structure and can be decoded independently, the access points are positioned at different relative timestamps within each stream (e.g., first stream has access point at T1, second stream at T2 where T1 ≠ T2). This asymmetric timing arrangement allows the receiver to select the stream with the earliest access point to minimize latency while maintaining synchronization stability.
Data Source
AI summary
A system and method that provide reduced latency in a video signal processing system. Various aspects of the present invention may comprise transmitting a first video information stream representative of a unit of video information. For example, the transmitted first video information stream may correspond to a video channel. A second video information stream representative of the unit of video information may be transmitted simultaneously with the first video information stream. The second video information stream may also, for example, correspond to the video channel. Various aspects of the present invention may comprise receiving a plurality of simultaneously transmitted video information streams. A video information stream of the plurality of received video information streams may be identified that, when processed, is expected to result in the lowest latency in presenting the unit of video information to the user. The identified video information stream may then be so processed.