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US5623314A
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MPEG decoder memory data storage and transfer
Assignee: Qualcomm Technologies International Ltd
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Filing: 1994-05-18
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Granted: 1997-04-22
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Expires: 2014-05-18
Abstract
Abstract Data transfer and timing in an external DRAM memory of an MPEG decoder utilizes a repetitive pattern for synchronous writing and reading of data and data refresh including a sequence header at the beginning of a picture, a macroblock header for each of the macroblocks of a picture, and a plurality of repetitions of block decoding after each macroblock header decode.
Inventors
- 👤 Refael Retter
- 👤 Moshe Bublil
- 👤 Gad Shavit
- 👤 Aharon Gill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:25
CPC Classifications
H; H04; H04N; H04N19/00; H04N19/42; H04N19/423; H04N19/60; H04N19/61
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
In an MPEG decoder, a method of picture data transfer from a DRAM memory and processing comprising the steps of a) decoding a sequence header for each picture data having a plurality of macroblocks, b) decoding a macroblock header at the beginning of each macroblock, and c) executing a fixed plurality of repetitions of block decoding after each macroblock header decoding.
Claim 2
Dependent Claim
61 words
In an MPEG decoder, a method of picture data transfer from a DRAM memory and processing comprising the steps of a) decoding a sequence header for each picture data having a plurality of macroblocks, b) decoding a macroblock header at the beginning of each macroblock, and c) executing a fixed plurality of repetitions of block decoding after each macroblock header decoding.
Claim 3
Dependent Claim
21 words
The method as defined by claim 1 wherein step (a) includes decoding a group of pictures header and picture header decoding.
Claim 4
Dependent Claim
40 words
The method as defined by claim 1 wherein step (a) is executed once at the beginning of a picture, step (b) is executed once at the beginning of a macroblock, and step (c) is executed repetitively six times per macroblock.
Claim 5
Dependent Claim
28 words
The method as defined by claim 1 where step c) includes video and serial coded data write, video code data read, serial code data read, and data refresh.
Claim 6
Dependent Claim
25 words
The method as defined by claim 2 where step c) further includes Y component data read for display, and U/V components data read for display.
Claim 7
Dependent Claim
48 words
The method as defined by claim 1 wherein step (b) is executed in the following order: code read, code write, serial coded data (port 1) read, serial coded data (port 2) read, refresh, Y samples data read for display and U or V samples data read for display.
Claim 8
Dependent Claim
54 words
The method as defined by claim 6 wherein step (c) is executed repetitively a plurality of times in the following order: code read, first picture data read for reference, second picture data read for reference, decoded picture data write, Y samples data read for display and U or V samples data read for display.
References Cited (Backward Citations)
US5122875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-04-21 | 2000-10-21 | 2001-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-04-21 | 2004-10-21 | 2005-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-04-21 | 2008-10-21 | 2009-04-22 | $7700.00 | Window Closed / Lapsed |