US6025878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for decoding both high and standard definition video signals using a single video decoder
Assignee: Hitachi America Ltd
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Filing: 1997-04-25
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Granted: 2000-02-15
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Expires: 2017-04-25
Abstract
Abstract Methods and apparatus for implementing a reduced cost HDTV/SDTV video decoder are disclosed. The described joint video decoder is capable of decoding HDTV pictures at approximately the resolution of standard definition television pictures and can be used to decode HDTV and/or SDTV pictures. The described video decoder may be used as part of a picture-in-picture decoder circuit for providing picture-in-picture capability without providing multiple full resolution video decoders. The reduction in decoder circuit complexity is achieved through the use of a plurality of data reduction techniques including the use of a preparser, downsampling, and truncating pixel values.
Inventors
- 👤 Jill McDonald Boyce
- 👤 Larry Pearlstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:41
CPC Classifications
H; H04; H04N; H04N19/00; G; G06; G06T; G06T3/00; G06T3/40; G06T3/4007; G06T3/4084; G11; G11B; G11B5/00; G11B5/008; G11B5/00813; G11B5/00847; G11B5/0086; H03; H03M; H03M7/00; H04N19/10; H04N19/102; H04N19/117; H04N19/124; H04N19/132; H04N19/134; H04N19/136; H04N19/137; H04N19/139; H04N19/157; H04N19/159; H04N19/16; H04N19/162; H04N19/169; H04N19/17; H04N19/172; H04N19/176; H04N19/18; H04N19/184; H04N19/189; H04N19/192; H04N19/40; H04N19/42; H04N19/423; H04N19/426; H04N19/427; H04N19/428; H04N19/44; H04N19/46; H04N19/48; H04N19/50; H04N19/503; H04N19/51; H04N19/513; H04N19/587; H04N19/59; H04N19/60; H04N19/61; H04N19/70; H04N19/80; H04N19/82; H04N19/90; H04N21/00; H04N21/20; H04N21/23; H04N21/231; H04N21/23106; H04N21/234; H04N21/2343; H04N21/236; H04N21/25; H04N21/266; H04N21/2662; H04N21/40; H04N21/41; H04N21/426; H04N21/43; H04N21/431; H04N21/4312; H04N21/4316; H04N21/432; H04N21/4325; H04N21/434; H04N21/438; H04N21/4382; H04N21/44; H04N21/4402; H04N21/440254; H04N21/440263; H04N21/45; H04N21/462; H04N21/4621; H04N5/00; H04N5/44; H04N5/445; H04N5/45; H04N5/46; H04N9/00; H04N9/79; H04N9/80; H04N9/804; H04N9/8042; G11B15/00; G11B15/02; G11B15/12; G11B15/125; G11B15/18; G11B15/1808; G11B15/1875; G11B15/46; G11B15/467; G11B15/4673; H04N19/13; H04N19/30; H04N19/91; H04N5/76; H04N5/78; H04N5/782; H04N5/7824; H04N5/7826; H04N5/78263; H04N9/82; H04N9/8205; H04N9/8227
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
137 words
A decoder for decoding a signal including digital data representing an image of either a first or second image resolution, the decoder comprising: means for storing at least a portion of the digital data representing the image; means for detecting whether the image is of the first or second image resolution, the second image resolution being higher than the first image resolution and using more data to represent the image than the first image resolution; means for processing the digital data representing the image to reduce the amount of digital data used to represent the image, when it is detected that the image is of the second image resolution, thereby generating a reduced set of image data; and reduced image data storing means for storing the reduced set of image data generated by the data processing means.
Claim 2
Dependent Claim
137 words
A decoder for decoding a signal including digital data representing an image of either a first or second image resolution, the decoder comprising: means for storing at least a portion of the digital data representing the image; means for detecting whether the image is of the first or second image resolution, the second image resolution being higher than the first image resolution and using more data to represent the image than the first image resolution; means for processing the digital data representing the image to reduce the amount of digital data used to represent the image, when it is detected that the image is of the second image resolution, thereby generating a reduced set of image data; and reduced image data storing means for storing the reduced set of image data generated by the data processing means.
Claim 3
Dependent Claim
42 words
The decoder of claim 1, further comprising: image postprocessor means coupled to the reduced image data storing means for reducing the visual effect of the data reduction processing operation on a video image generated from the stored reduced set of image data.
Claim 4
Dependent Claim
25 words
The decoder of claim 2, wherein the decoder is an MPEG compatible video decoder capable of decoding both high definition and standard definition video images.
Claim 5
Dependent Claim
43 words
The decoder of claim 2, wherein the processing means reduced the amount of data used to represent the image of the second degree of resolution to an amount which approximates the amount of data used to represent an image of the first resolution.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-02-14 | 2003-08-16 | 2004-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-02-14 | 2007-08-16 | 2008-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-02-14 | 2011-08-16 | 2012-02-15 | $7700.00 | Window Closed / Lapsed |