Method and system for rapid channel change providing stored images of current channel programs
First Claim
1. A method for changing channels in a digital television transport stream, comprising:
- accessing said digital television transport stream comprising a plurality of multiplexed channels by use of a first tuner;
displaying current video programming from a first program channel from said digital television transport stream;
detecting and storing recent video data from a second program channel from said transport stream, by use of a second tuner, in a buffer memory while displaying said first channel;
recalling from said buffer memory and presenting a complete still video image of said second channel for display when said second channel is selected by a user; and
displaying current video programming from said second channel when decodable current video data becomes available from said transport stream.
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Accused Products
Abstract
Disclosed is a method for changing channels in a digital television transport stream, which comprises accessing the digital television transport stream, itself comprising a plurality of multiplexed channels, by using a first tuner, displaying a first program channel from the digital television transport stream, detecting and storing in a buffer memory recent video data from a second channel while displaying the first channel by using a second tuner, immediately recalling and presenting a complete video frame from the stored video data of the second channel for display when the second channel is selected by the user, and displaying real-time video from the second channel when decodable real-time video data is available from the transport stream.
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Citations
28 Claims
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1. A method for changing channels in a digital television transport stream, comprising:
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accessing said digital television transport stream comprising a plurality of multiplexed channels by use of a first tuner;
displaying current video programming from a first program channel from said digital television transport stream;
detecting and storing recent video data from a second program channel from said transport stream, by use of a second tuner, in a buffer memory while displaying said first channel;
recalling from said buffer memory and presenting a complete still video image of said second channel for display when said second channel is selected by a user; and
displaying current video programming from said second channel when decodable current video data becomes available from said transport stream. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A display system for channel change of channels of a digital transport stream, comprising:
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a demultiplexing device for separating a digital television channel from said digital transport stream comprising a plurality of multiplexed channels;
a memory device coupled to said demultiplexing device for storing a recent frame of said digital television channel;
a channel selecting device for selecting said digital television channel from among said plurality of multiplexed channels; and
a decoding device coupled to said memory device and to said demultiplexing device for decoding said digital television channel for presentation in a display, wherein said stored frame is first supplied to said decoding device for still image display in response to a channel change to said digital television channel followed by digital data from said demultiplexing device. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A digital television receiver comprising:
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a demultiplexer for separating a digital transport stream into a plurality of individual digital channels;
a plurality of buffers, each buffer for storing a recent frame associated with an individual digital channel;
a decoder for decoding digital data associated with a channel for display on a display screen; and
logic, responsive to a channel change, for supplying said decoder with a stored frame from a buffer associated with a selected channel for still image display, said logic then supplying said decoder with digital data associated with said selected channel from said demultiplexer. - View Dependent Claims (19, 20, 21, 22)
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23. A method of decoding information for display on a display screen comprising:
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a) tuning a plurality of digital channel signals in a digital transport stream;
b) periodically storing a recent frame associated with each individual digital channel signal of said plurality of individual digital channel signals;
c) generating a signal representing a first digital channel for supply to said display screen by decoding a digital channel signal associated with a first digital channel;
d) responsive to a channel change from said first digital channel to a second digital channel, performing the following;
d1) recalling a stored recent frame associated with said second digital channel;
d2) displaying a still image representing said stored recent frame while awaiting a decodable digital video signal associated with said second digital channel; and
d3) generating a signal representing said second digital channel for supply to said display screen by decoding said video signal associated with said second digital channel in reference to said stored recent frame of said d1). - View Dependent Claims (24, 25, 26, 27, 28)
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Specification