US5621464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reordering a decoded video picture sequence
Assignee: Panasonic Holdings Corp
•
Filing: 1995-02-02
•
Granted: 1997-04-15
•
Expires: 2015-02-02
Abstract
Abstract This invention details a new method of performing frame reordering for decoded digital video picture. By making use of the information on the incoming picture type and the location of the stored bi-directionally predicitive (B) coded, frame in the frame buffer, the frame sequencer can adaptively perform frame reordering for sequence with and without B frame. In addition, the frame reordering is achieved with shorter frame delay and with smaller frame memory.
Inventors
- 👤 Eng H. Teo
- 👤 Chee S. Khor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:20
CPC Classifications
H; H04; H04N; H04N19/00; H04N19/50; H04N19/503; H04N19/51; H04N19/577; H04N19/42; H04N19/423; H04N19/60; H04N19/61
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
170 words
A method of reordering a decoded video picture sequence into a sequence of correct display order, the method comprising the steps: determining whether an incoming picture type of an incoming decoded picture is an intra-coded frame type, a predictively-coded frame type or a bi-directionally-predictive coded frame type, determining which one of three frame buffers in a memory buffer is to be used for storing the incoming decoded picture in response to the incoming picture type and determining an availability of each one of the three frame buffers, where each one of the three frame buffers can store a fully decoded video picture having any one of the intra-coded frame type, the predictively-coded frame type, and the bi-directionally-predictive coded frame type, identifying the incoming picture type of the incoming decoded picture stored in each one of the three frame buffers, and determining the incoming picture type to be displayed and which one of the three frame buffers contains the incoming decoded picture which has the incoming picture type to be displayed.
Claim 2
Independent Claim
170 words
A method of reordering a decoded video picture sequence into a sequence of correct display order, the method comprising the steps: determining whether an incoming picture type of an incoming decoded picture is an intra-coded frame type, a predictively-coded frame type or a bi-directionally-predictive coded frame type, determining which one of three frame buffers in a memory buffer is to be used for storing the incoming decoded picture in response to the incoming picture type and determining an availability of each one of the three frame buffers, where each one of the three frame buffers can store a fully decoded video picture having any one of the intra-coded frame type, the predictively-coded frame type, and the bi-directionally-predictive coded frame type, identifying the incoming picture type of the incoming decoded picture stored in each one of the three frame buffers, and determining the incoming picture type to be displayed and which one of the three frame buffers contains the incoming decoded picture which has the incoming picture type to be displayed.
Claim 3
Dependent Claim
83 words
A method of reordering a decoded video picture sequence according to claim 1, wherein the decoded picture sequence includes a first incoming decoded picture which is the bi-directionally-predictively-coded frame type and a next incoming video picture which is the bi-directionally-predictively coded frame type, the method further comprising the steps of: selecting one of three frame buffers to store the next incoming video picture, and designating the selected frame buffer as a next frame buffer to be read in a next frame display period.
Claim 4
Dependent Claim
62 words
A method of reordering a decoded video picture sequence according to claim 1, wherein each one of the incoming decoded pictures in the video picture sequence is only (1) the intra-coded frame type or (2) the predictively-coded frame type, the method further comprising the steps of: retrieving decoded video pictures from the three frame buffers in a First in First Out order.
Claim 5
Dependent Claim
41 words
The method of claim 1, further comprising the step of storing the incoming decoded picture having any one of the intra-coded frame type, the predictively-coded frame type, and the bi-directionally-predictive coded frame type; in any one of the three frame buffers.
Claim 6
Dependent Claim
95 words
The method of claim 1 wherein the incoming picture sequence includes a first incoming decoded picture which is the bi-directionally-predictive frame type and a next incoming decoded picture which is only one of (1) the intra-coded frame type and (2) the predictively-coded frame type, the method further comprising the step of: selecting one of the three frame buffers which is not selected (1) for storage of the next incoming decoded picture or (2) for reading a picture to be displayed, as a next frame buffer to be read for display in a next frame period.
Claim 7
Independent Claim
206 words
A method of reordering a decoded video picture sequence into a sequence of correct display order in a system having frame buffer memories, the method comprising the steps: determining whether an incoming picture type of an incoming decoded picture is an intra-coded frame type, a predictively-coded frame type, or a bi-directionally-predictive coded frame type, where the intra-coded frame type refers to a coded frame using only information from itself, the predictively-coded frame type refers to a coded frame using motion estimation and compensation techniques with information from a previously coded intra-coded or predictively-coded frame, and a bi-directionally-predictively coded frame type refers to a coded frame using motion estimation and compensation techniques with information from a previous and a future intra-coded or predictively-coded frame, determining which one of the frame buffer memories is used for storing the incoming picture frame based on the incoming picture type, determining which one of the frame buffer memories should be selected for scanning out the picture frame in the sequence of correct display order, and rescanning the decoded video picture in a First In First Out order from the frame buffer memories when (1) the intra-coded frame type or (2) the intra-coded frame type and the predictively-coded frame type, are present.
Claim 8
Independent Claim
206 words
A method of reordering a decoded video picture sequence into a sequence of correct display order in a system having frame buffer memories, the method comprising the steps: determining whether an incoming picture type of an incoming decoded picture is an intra-coded frame type, a predictively-coded frame type, or a bi-directionally-predictive coded frame type, where the intra-coded frame type refers to a coded frame using only information from itself, the predictively-coded frame type refers to a coded frame using motion estimation and compensation techniques with information from a previously coded intra-coded or predictively-coded frame, and a bi-directionally-predictively coded frame type refers to a coded frame using motion estimation and compensation techniques with information from a previous and a future intra-coded or predictively-coded frame, determining which one of the frame buffer memories is used for storing the incoming picture frame based on the incoming picture type, determining which one of the frame buffer memories should be selected for scanning out the picture frame in the sequence of correct display order, and rescanning the decoded video picture in a First In First Out order from the frame buffer memories when (1) the intra-coded frame type or (2) the intra-coded frame type and the predictively-coded frame type, are present.
References Cited (Backward Citations)
US4999705A
Cited
US5168356A
Cited
US5146325A
Cited
US5185819A
Cited
US5317397A
Cited
US5241383A
Cited
US5479209A
Cited
US5410354A
Cited
US5398072A
Cited
US5452006A
Cited
US5502493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-04-14 | 2000-10-14 | 2001-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-04-14 | 2004-10-14 | 2005-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-04-14 | 2008-10-14 | 2009-04-15 | $7700.00 | Window Closed / Lapsed |