EP0508654A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Virtual channels for a multiplexed analog component (MAC) television system
Assignee: Scientific Atlanta LLC
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Filing: 1992-03-27
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Granted: —
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Expires: 2012-03-27
Abstract
Abstract A decoder for use in a television system. The decoder includes a receiver for receiving a television signal having at least one channel. Each channel of the television signal includes video and audio components. A channel maps the channel received by the receiver to a plurality of virtual channels. A first virtual channel utilizes a first combination of video and audio components of the received channel and a second virtual channel utilizes a second combination of video and audio components of the same received channel different than the first combination. A selector allows a subscriber to select one of the virtual channels. Linked text pages may also be mapped to one or more of the virtual channels.
Inventors
- 👤 Robert Yoneda
- 👤 Keith Gammie
- 👤 Wayne C/O Scientific-Atlanta Inc. Sheldrick
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 06:09
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/08; H04N7/083; H04N5/00; H04N5/44; H04N5/60; H04N5/602; H04N7/087; H04N7/088; H04N7/0882; H04N7/0888; H04N7/16; H04N7/173; H04N7/17345; H04N7/17363
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
104 words
A decoder for use in a television system, said decoder comprising: a receiver for receiving a television signal comprising at least one channel, each channel of said television signal comprising video and audio components; a channel map for mapping said at least one channel received by said receiver to a plurality of virtual channels, first virtual channel utilizing a first combination of video and audio components of a received channel and a second virtual channel utilizing a second combination of video and audio components of the same received channel different than the first combination; and selector means for selecting one of said virtual channels.
Claim 2
Dependent Claim
120 words
A decoder for use in a multiplexed analog component (MAC) television system, said decoder comprising: a receiver for receiving a MAC television signal comprising at least one channel, each channel of said MAC television signal comprising a video component and an audio component including a plurality of audio channels; a channel map for mapping said at least one channel received by said receiver to a plurality of virtual channels, a first virtual channel utilizing a first combination of video and audio components of a received channel and a second virtual channel utilizing a second combination of video and audio components of the same received channel different than the first combination; and selector means for selecting one of said virtual channels.
Claim 3
Dependent Claim
42 words
The decoder according to claim 2 wherein the first virtual channel comprises the video and first and second audio channels of the received channel and the second virtual channel comprises the video and third and fourth audio channels of the received channel.
Claim 4
Dependent Claim
21 words
The decoder according to claim 3 further comprising a third virtual channel comprising a fifth audio channel of the received channel.
Claim 5
Dependent Claim
131 words
An encoder for use in a multiplexed analog component (MAC) television system including a plurality of remotely located decoders, said encoder comprising: a transmitter for transmitting a MAC television signal comprising at least one channel, each channel of said MAC television signal comprising a video component and an audio component including a plurality of audio channels; means for generating a channel map for use by said decoders mapping said at least one channel to a plurality of virtual channels, a first virtual channel utilizing a first combination of video and audio components of the transmitted channel and a second virtual channel utilizing a second combination of video and audio components of the same transmitted channel different than the first combination; and means for downloading the channel map to said remote decoders.
Claim 6
Dependent Claim
42 words
The encoder according to claim 5 wherein the first virtual channel comprises the video and first and second audio channels of the received channel and the second virtual channel comprises the video and third and fourth audio channels of the received channel.
Claim 7
Dependent Claim
21 words
The encoder according to claim 6 further comprising a third virtual channel comprising a fifth audio channel of the received channel.
Claim 8
Dependent Claim
129 words
A decoder for use in television system, said decoder comprising: a receiver for receiving a television signal including a plurality of text pages therein which are linked such that a first text page is accompanied by information identifying a second text page associated therewith; a channel map for mapping the text pages to a plurality of virtual channels, each virtual channel having linked text pages mapped thereto in accordance with root text pages defining a first text page on each of said virtual channels and root page spacing defining a number of text pages mapped to each of said virtual channels, a final page of a first virtual channel linked to the root page of a second virtual channel; and selector means for selecting one of said virtual channels.
Claim 9
Dependent Claim
141 words
An encoder for use in a television system including a plurality of remotely located decoders, said encoder comprising: a transmitter for transmitting a television signal comprising a plurality of text pages therein which are linked such that a first text page is accompanied by information identifying a second text page associated therewith; means for generating a channel map for mapping the text pages to a plurality of virtual channels, each virtual channel having linked text pages mapped thereto in accordance with root text pages defining a first text page on each of said virtual channels and root page spacings defining a number of text pages mapped to each of said virtual channels, a final page of a first virtual channel linked to the root page of a second virtual channel; and means for downloading said channel map to said remote decoders.
Claim 10
Dependent Claim
119 words
The decoder according to claim 1 wherein the television signal further comprises a plurality of text pages which are linked such that a first text page is accompanied by information identifying a second text page associated therewith and wherein said channel map maps said text pages to a plurality of text virtual channels, each text virtual channel having linked text pages mapped thereto in accordance with root text pages defining a first text page on each of said text virtual channels and root page spacings defining a number of text pages mapped to each of said text virtual channels, a final page of a first text virtual channel linked to the root page of a second text virtual channel.
References Cited (Backward Citations)
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