Digital broadcast receiver and broadcast data display method for simultaneous display of multi-channel visual images
First Claim
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1. A digital broadcast receiver comprising:
- a broadcast receiving unit for simultaneously receiving digital broadcast data on a plurality of channels;
a broadcast output unit for simultaneously outputting real-time broadcast data of a particular one of the channels and still images of the remaining channels on a single screen; and
a still image updater for periodically updating the still images of the remaining channels, while continuing the outputting of the real-time broadcast data of the particular one of the channels,wherein the still image updater comprises an I-frame detector for repeatedly detecting an I-frame in broadcast data of a current minor channel on an I-frame period basis and an I-frame storage for storing detected I-frames of minor channels and updating a stored I-frame of the current minor channel with a newly detected I-frame,wherein the I-frame detector compares sizes of received image frames and detects a relatively large image frame as an I-frame, andwherein the broadcast output unit comprises a major channel buffer for storing real-time broadcast data of a major channel and an image synthesizer for generating a screen output image using the real-time broadcast data stored in the major channel buffer and I-frames stored in the I-frame storage.
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Abstract
A digital broadcast receiver and broadcast data display method enabling simultaneous display of multi-channel visual images are disclosed. The broadcast data display method includes receiving digital broadcast data on a plurality of channels; simultaneously outputting on a single screen real-time broadcast data of a selected channel and still images of the remaining channels; and periodically updating the still images of the remaining channels. Thereby, up-to-date multi-channel visual images are simultaneously output. Hence, the user can easily perform channel selection and channel switching.
30 Citations
24 Claims
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1. A digital broadcast receiver comprising:
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a broadcast receiving unit for simultaneously receiving digital broadcast data on a plurality of channels; a broadcast output unit for simultaneously outputting real-time broadcast data of a particular one of the channels and still images of the remaining channels on a single screen; and a still image updater for periodically updating the still images of the remaining channels, while continuing the outputting of the real-time broadcast data of the particular one of the channels, wherein the still image updater comprises an I-frame detector for repeatedly detecting an I-frame in broadcast data of a current minor channel on an I-frame period basis and an I-frame storage for storing detected I-frames of minor channels and updating a stored I-frame of the current minor channel with a newly detected I-frame, wherein the I-frame detector compares sizes of received image frames and detects a relatively large image frame as an I-frame, and wherein the broadcast output unit comprises a major channel buffer for storing real-time broadcast data of a major channel and an image synthesizer for generating a screen output image using the real-time broadcast data stored in the major channel buffer and I-frames stored in the I-frame storage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A broadcast data display method for a digital broadcast receiver, comprising:
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receiving digital broadcast data on a plurality of channels; outputting simultaneously real-time broadcast data of a selected one of the channels and still images of the remaining channels on a single screen; and periodically updating the still images of the remaining channels while continuing the outputting of the real-time broadcast data of the selected one of the channels, wherein updating the still images comprises repeatedly detecting an I-frame in broadcast data of a current minor channel on an I-frame period basis, storing detected I-frames of minor channels, and updating a stored I-frame of the current minor channel with a newly detected I-frame, wherein detecting the I-frame comprises comparing sizes of received image frames and detecting a relatively large image frame as an I-frame, wherein the simultaneously outputting step comprises outputting real-time broadcast data of individual minor channels in sequence together with the real-time broadcast data to the single screen, and wherein the sequence includes one I-frame from each of preset minor channels. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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Specification