Composite Video Stream Multiplexing for Bandwidth Efficiency
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Solution Overview
Problem
Traditional television distribution systems require multiple tuners to display multiple video streams simultaneously, leading to inefficient bandwidth usage and increased hardware requirements, especially for barker channels that often transmit with unused portions of the video stream as black.
Innovation Solution
A system that transmits a single composite video stream with dynamically rearranged barker videos, allowing for user-customized and sized barker videos by identifying unused screen areas in existing video streams and placing requested videos within these areas, thereby optimizing bandwidth usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple separate video streams are transmitted for multiple videos, then each video can be displayed independently, but bandwidth usage increases and multiple tuners are required
Solution Approach 1:
The patent combines multiple separate video streams into a single composite video stream by multiplexing them together. The system merges the main video stream with additional video streams (such as barker videos) into one unified stream that can be transmitted over a single tuner, eliminating the need for multiple separate tuners and reducing bandwidth consumption.
Solution Approach 2:
The single composite video stream serves multiple functions simultaneously - it carries the main program content as well as additional video content like barker videos. This multi-functional approach allows one video stream to fulfill multiple display purposes, replacing what would traditionally require multiple separate streams and tuners.
2Adaptability or versatility
If barker videos are transmitted on separate full-sized video streams, then each barker video can be displayed independently, but bandwidth is wasted due to unused screen areas being transmitted as black
Solution Approach 1:
The patent embeds smaller barker video streams within the larger main video stream structure. The barker videos are nested into unused portions of the main video stream, allowing multiple video contents to be contained within a single stream hierarchy. This nesting approach enables efficient bandwidth utilization while maintaining the ability to display multiple videos independently.
Solution Approach 2:
The system applies different quality and resolution characteristics to different parts of the composite video stream. The main video stream receives full quality treatment, while barker videos in unused areas are transmitted at lower resolutions or with reduced quality, optimizing overall bandwidth usage while maintaining adequate display quality for each video's intended purpose.
3Ease of operation
If traditional picture-in-picture capability is implemented with two tuners, then two video streams can be displayed simultaneously, but hardware requirements and system complexity increase
Solution Approach 1:
The patent merges the functionality of multiple tuners into a single tuner by combining multiple video streams into one composite stream. The set-top box processes the composite stream and extracts individual video contents, providing picture-in-picture capability without requiring multiple physical tuners, thereby reducing hardware complexity while maintaining ease of operation.
Data Source
AI summary
A request for a first video may be received from an end user device. A video size for the requested first video may be determined. An unused onscreen location to place the requested first video, within one of a plurality of composite mosaic video streams, may be determined. The unused onscreen location may correspond to a location for insertion of video content for output to an onscreen location of an output device. Information identifying the unused onscreen location may be transmitted to a content source of the requested first video. The requested first video based upon the unused onscreen location information may be received from the content source. The requested first video then may be placed with at least one second video into a composite video stream based upon the unused onscreen location, and the composite video stream may be transmitted to the end user device.