Apparatus and method for decoding an information page having header information and page data
First Claim
1. Apparatus for decoding an information page having header information and page data, comprising:
- means for receiving at least one information page each having header information and page data, said page data representing information to be combined with a video image;
storage means for storing each received information page as a respective page therein, said storage means being controllable to read out selected stored data;
means for detecting the header information after being stored as one of the pages of said storage means;
control means for controlling said storage means to read out the detected header information a first time outside the effective field of the video image, and for controlling said storage means to read out in real time, at a time in accordance with presentation time data included in the first time read out header information, the detected header information a second time and the stored page data corresponding to said detected header information; and
means for decoding the read out page data and supplying the decoded read out page data as an output.
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Accused Products
Abstract
Apparatus and method for decoding pages of subtitle data supplied as information pages which include respective headers and page data (i.e., subtitle character data) which are superimposed on a video signal. Each received information page is stored in a ring-type memory as a respective page therein, and the header of a page stored in memory is detected prior to being pre-read therefrom. The detected header is read from memory a second time and the page data is read from memory at a time in accordance with certain data included in the pre-read header. The page data is decoded and supplied as an output to be combined with the video signal.
60 Citations
23 Claims
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1. Apparatus for decoding an information page having header information and page data, comprising:
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means for receiving at least one information page each having header information and page data, said page data representing information to be combined with a video image; storage means for storing each received information page as a respective page therein, said storage means being controllable to read out selected stored data; means for detecting the header information after being stored as one of the pages of said storage means; control means for controlling said storage means to read out the detected header information a first time outside the effective field of the video image, and for controlling said storage means to read out in real time, at a time in accordance with presentation time data included in the first time read out header information, the detected header information a second time and the stored page data corresponding to said detected header information; and means for decoding the read out page data and supplying the decoded read out page data as an output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. Method of decoding an information page having header information and page data, comprising:
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receiving at least one information page each having header information and page data, said page data representing information to be combined with a video image; storing each received information page in a memory as a respective page therein; detecting the header information after being stored as in one of the pages of the memory; reading from the memory, a first time, outside the effective field of the video image, the detected header information; reading from the memory in real time, at a time in accordance with presentation time data included in the first time read out header information, the detected header information a second time and the stored page data corresponding to the detected header information; decoding the read out page data; and supplying the decoded read out page data as an output. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification