Patent US5696980A successfully refreshed from Google Patents.
Patent US5508750A successfully refreshed from Google Patents.
US5508750A
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Encoding data converted from film format for progressive display
Assignee: Texas Instruments Inc
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Filing: 1995-02-03
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Granted: 1996-04-16
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Expires: 2015-02-03
Abstract
Abstract A method of encoding video display data, after that data has been previously converted from a film frame rate to a faster video frame rate, such as by 3:2 pulldown. The data is first re-converted to the film frame format, as progressive frames (21). This progressive frame data is processed to determine where scene cuts occur (22). The data is then encoded consistent with MPEG encoding techniques, but with the scene cut information being used to begin groups of pictures (GOPs) at scene cuts and to determine where intrapictures, predicted pictures, or interpolated pictures shall occur (23).
Inventors
- 👤 Gregory J. Hewlett
- 👤 Robert J. Gove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:57
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/14; H04N5/147; G; G11; G11B; G11B27/00; G11B27/02; G11B27/031; H04N19/00; H04N19/10; H04N19/134; H04N19/142; H04N19/169; H04N19/179; H04N19/46; H04N19/85; H04N19/87; H04N5/74; H04N5/7416; H04N5/7458; H04N7/00; H04N7/01; H04N7/0112; H04N7/0117; H04N7/012
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
79 words
A method of encoding video display data, after that data has been previously converted from a film frame rate to a faster video frame rate, comprising the steps of: re-converting the data to the film frame rate, thereby obtaining progressive frame data; detecting when scene cuts occur in said progressive frame data; and encoding said progressive frame data, such that each scene cut begins a new group-of-pictures (GOP) and each new GOP has an intrapicture as the first picture.
Claim 2
Independent Claim
79 words
A method of encoding video display data, after that data has been previously converted from a film frame rate to a faster video frame rate, comprising the steps of: re-converting the data to the film frame rate, thereby obtaining progressive frame data; detecting when scene cuts occur in said progressive frame data; and encoding said progressive frame data, such that each scene cut begins a new group-of-pictures (GOP) and each new GOP has an intrapicture as the first picture.
Claim 3
Dependent Claim
31 words
The method of claim 1, wherein said video display data has been previously converted by repeating fields, and wherein said re-converting step is performed by detecting a pattern of repeated fields.
Claim 4
Dependent Claim
18 words
The method of claim 2, wherein said pattern of repeated fields are detected by calculating field difference values.
Claim 5
Dependent Claim
32 words
The method of claim 1, wherein said video display data has been previously converted using a 3:2 pulldown process, and wherein said re-converting step is performed by detecting the 3:2 pulldown pattern.
Claim 6
Dependent Claim
21 words
The method of claim 1, wherein said detecting step is performed by calculating frame difference values in said progressive frame data.
Claim 7
Dependent Claim
26 words
The method of claim 1, wherein said detecting step is further performed by analyzing a series of frame difference values to distinguish motion from scene cuts.
Claim 8
Dependent Claim
14 words
The method of claim 6, wherein said frame difference values are spatial domain values.
Claim 9
Dependent Claim
14 words
The method of claim 6, wherein said frame difference values are frequency domain values.
Claim 10
Dependent Claim
27 words
The method of claim 1, wherein said encoding step is performed such that the last picture of each GOP is either an intrapicture or an interpolated picture.
Claim 11
Dependent Claim
28 words
The method of claim 9, wherein said encoding steps is performed such that pictures within each GOP, except said first picture or said last picture, include interpolated pictures.
Claim 12
Dependent Claim
18 words
The method of claim 1, wherein said encoding step is performed in parallel for a number of GOPs.
Claim 13
Dependent Claim
90 words
A processor for encoding video display data, after that data has been previously converted from a film frame rate to a faster video frame rate, comprising: a reverse pulldown processor for re-converting the data to the slower film frame rate, thereby obtaining progressive frame data; a scene cut detector for detecting when scene cuts occur in said progressive frame data; and an encoder for encoding said progressive frame data, such that each scene cut begins a new group-of-pictures (GOP) and each new GOP has an intrapicture as the first picture.
Claim 14
Dependent Claim
90 words
A processor for encoding video display data, after that data has been previously converted from a film frame rate to a faster video frame rate, comprising: a reverse pulldown processor for re-converting the data to the slower film frame rate, thereby obtaining progressive frame data; a scene cut detector for detecting when scene cuts occur in said progressive frame data; and an encoder for encoding said progressive frame data, such that each scene cut begins a new group-of-pictures (GOP) and each new GOP has an intrapicture as the first picture.
Claim 15
Dependent Claim
29 words
The method of claim 12, wherein said video display data has been previously converted by repeating fields, and wherein said reverse pulldown processor detects a pattern of repeated fields.
Claim 16
Dependent Claim
14 words
The method of claim 13, wherein said reverse pulldown processor calculates field difference values.
Claim 17
Dependent Claim
30 words
The method of claim 12, wherein said video display data has been previously converted using a 3:2 pulldown process, and wherein said reverse pulldown processor detects the 3:2 pulldown pattern.
Claim 18
Dependent Claim
19 words
The method of claim 12, wherein said scene cut detector calculates frame difference values in said progressive frame data.
Claim 19
Dependent Claim
23 words
The method of claim 12, wherein said scene cut detector analyzes a series of frame difference values to distinguish motion from scene cuts.
Claim 20
Dependent Claim
23 words
The method of claim 12, wherein said encoder encodes the last picture of each GOP as either an intrapicture or an interpolated picture.
Claim 21
Dependent Claim
24 words
The method of claim 18, wherein said encoder encodes pictures within each GOP, except said first picture or said last picture, as interpolated pictures.
Claim 22
Dependent Claim
19 words
The method of claim 12, wherein said processor has a number of encoders for encoding different scenes in parallel.
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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) | 1999-04-16 | 1999-10-16 | 2000-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-04-16 | 2003-10-16 | 2004-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-04-16 | 2007-10-16 | 2008-04-16 | $7700.00 | Window Closed / Lapsed |