Subtitle encoding/decoding method and apparatus
First Claim
1. A method of storing subtitles composed of bit streams of subtitle data on a record medium having sectors arranged by address, said subtitles being stored with encoded video data constituting a video picture composed of a series of video frames, comprising the steps of:
- writing a first subtitle to be displayed with said video frames during a normal playback mode on the record medium at a first address;
writing said first address on said record medium in an area reserved for addresses of the record medium;
writing a second subtitle, different in textual content from said first subtitle, to be displayed during a trick playback mode, on the record medium at a second address; and
writing said second address on said record medium in said area reserved for addresses.
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Accused Products
Abstract
Subtitle searching is achieved by encoding a subtitle to be displayed exclusively during a trick playback mode. Addresses for the subtitle to be played back during the trick playback mode are stored on a record medium reserved for addresses. A computer-readable memory directs a computer to retrieve these addresses and locate subtitles to be displayed during the trick playback mode on the record medium. The subtitles are searched by decoding and displaying the subtitles located at the addresses on the record medium to be displayed during the trick playback mode.
138 Citations
31 Claims
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1. A method of storing subtitles composed of bit streams of subtitle data on a record medium having sectors arranged by address, said subtitles being stored with encoded video data constituting a video picture composed of a series of video frames, comprising the steps of:
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writing a first subtitle to be displayed with said video frames during a normal playback mode on the record medium at a first address; writing said first address on said record medium in an area reserved for addresses of the record medium; writing a second subtitle, different in textual content from said first subtitle, to be displayed during a trick playback mode, on the record medium at a second address; and writing said second address on said record medium in said area reserved for addresses. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for writing subtitles composed of bit streams of subtitle data on a record medium having sectors arranged by address, said subtitles being recorded with encoded video data constituting a video picture composed of a series of video frames, comprising:
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subtitle writing means for writing a first subtitle to be displayed with said video frames during a normal playback mode on the record medium at a first address, and for writing a second subtitle, different in textual content from said first subtitle, to be displayed during a trick playback mode on the record medium at a second address; and multiplexing means for multiplexing the first subtitle, the second subtitle and the encoded video data; wherein said subtitle writing means writes the multiplexed data on said record medium, said first and second subtitles being written at said first and second addresses, respectively, and writes the first and second addresses on said record medium in an area reserved for addresses on the record medium. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A computer-readable memory for directing a computer to play back a subtitle to be displayed during a trick playback mode comprising:
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first pointing means for directing said computer during a normal playback mode to skip to an address pointing to a sector of said computer-readable memory where a first subtitle to be displayed with a respective video frame is stored and for causing said computer to read said first subtitle; and second pointing means for directing said computer during a trick playback mode to skip to an address pointing to a sector of said computer-readable memory where a second subtitle, being different in textual content from said first subtitle and to be displayed with said video frames, is stored and for causing said computer to read said second subtitle. - View Dependent Claims (14, 15)
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16. A method of reading subtitles composed of bit streams of subtitle data stored on a record medium having sectors arranged by address, said subtitles being encoded and recorded with video data constituting a video picture composed of a series of video frames to be displayed in normal and trick playback modes, comprising the steps of:
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reading out a subtitle address stored on said record medium pointing to a subtitle to be displayed during said trick playback mode which is different in textual content than subtitles to be displayed in said normal playback mode; reading out said subtitle stored on said record medium at said subtitle address read from said record medium; and decoding said subtitle for display with a respective video frame during said trick playback mode. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. An apparatus for recovering subtitles composed of bit streams of subtitle data from a record medium having sectors arranged by address, said subtitles being encoded and recorded with video data constituting a video picture composed of a series of video frames to be displayed in normal and trick playback modes, comprising:
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means for reading, from said record medium, a subtitle address pointing to a subtitle to be displayed exclusively during said trick playback mode and for reading said subtitle at said subtitle address, wherein said subtitle to be displayed exclusively during said trick playback mode is different in textual content than subtitles to be displayed in said normal playback mode; and means for decoding said subtitle for display with said respective video frame during said trick playback mode. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31)
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Specification