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System used for switching first set signal to second set signal

A technology of group signals and signals, applied in the field of systems for switching from a first group of signals to a second group of signals, can solve problems such as capacity limitations of cable TV and broadcast TV channels

Inactive Publication Date: 2004-10-06
ACTV INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Cable and broadcast TV channel capacity is becoming increasingly constrained as more and more cable channels are used for regular programming

Method used

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  • System used for switching first set signal to second set signal
  • System used for switching first set signal to second set signal
  • System used for switching first set signal to second set signal

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Embodiment Construction

[0033] The present invention relates to a system for seamlessly switching from a first group of signals to a second group of signals, and an embodiment of the system is shown in FIG. 15 . For the sake of clarity, however, an interactive television system using the present invention will be described in detail below.

[0034] The interactive television system described herein enables multiple viewers to simultaneously view multiple different program information message signals. A plurality of video signals 1 are provided. The video signal 1 may be, for example, various live and / or audio synchronized camera views in a sports show, or a game show with content and a presenter reacting to user selections. Additionally, the video signal 1 may be any video signal suitable for an interactive session as described in US Pat. There are various types of temporally and content related video signals suitable for interactive manipulation.

[0035] In previous systems, these various signal...

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Abstract

An interactive cable television system is disclosed which utilizes a standard cable television distribution network for simultaneously providing a plurality of viewers with an interactive television program comprising a plurality of signals related in time and content. Video signals are transmitted in a digital format, more than one signal being multiplexed onto a data stream on a single channel. The video signals may be compressed for efficiency. A receiver, in conjunction with a signal selector, selects a particular NTSC channel for playback, then selects a particular video signal from the data stream, and decompresses the video signal for playback. Seamless switching between video signals on different channels is provided. An alternative embodiment is disclosed wherein the various signals which comprise the interactive program are switched at the head end rather than at the receiver. The multiple choice control unit selects a desired signal by relaying the multiple choice selections of the user through a relay box back to a remotely located switching station. The switching station routes the correct video signal down the appropriate cable channel for the particular user.

Description

[0001] This application is submitted on December 16, 1998 with the application number 98811211.6 and the title of the invention "Method and device for performing seamless switching between two digital video signals" [0002] divisional application technical field [0003] The invention relates to a system for switching from a first set of signals to a second set of signals. Background technique [0004] US Patent 4,264,925 discloses techniques for developing interactive systems using conventional cable television systems. A standard television channel with time-synchronized content is broadcast to multiple subscribers. Each user switches between channels in response to an interrogation signal, thereby providing interactivity. [0005] Cable and broadcast television channel capacity is becoming more and more limited as more and more cable channels are used for regular programming. Prior art interactive systems require multiple channels. Accordingly, it would be desirable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/00H04N5/44H04N5/445H04N5/45H04N5/455H04N5/46H04N7/10H04N7/24
CPCH04N21/6587H04N21/4532H04N21/4331H04N21/435H04N21/4383H04N21/4347H04N21/2668H04N21/439H04N21/4305H04N21/812H04N5/4401H04N21/23424H04N21/458H04N21/2365H04N21/4316H04N7/104H04N5/46H04N21/233H04N5/45H04N21/44016H04N21/235H04N21/4263H04N21/426
Inventor 迈克尔J·弗里曼格雷戈里W·哈珀弗兰克P·德奥
Owner ACTV INC