US5398067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Picture data processing apparatus
Assignee: Sony Corp
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Filing: 1993-03-16
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Granted: 1995-03-14
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Expires: 2013-03-16
Abstract
Abstract A picture data processing apparatus, which is suitably applied, for instance, to a television conference system in which picture data are transmitted in the form of codes prevents, deterioration of the picture quality even if an edge in the picture data exits. In the apparatus, the presence or absence of an edge is detected for each block, and when a block having an edge is detected, a Wavelet transform is employed in transmission of the picture data, whereas a discrete cosine transform is employed when the block has no detected edge.
Inventors
- 👤 Takayuki Sakamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:59
CPC Classifications
H; H04; H04N; H04N19/00; H04N19/60; H04N19/63; H04N19/64; H04N19/645; H04N19/10; H04N19/102; H04N19/12; H04N19/122; H04N19/134; H04N19/136; H04N19/14; H04N19/154; H04N19/169; H04N19/17; H04N19/176; H04N19/61; H04N19/146
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
101 words
A picture data processing apparatus which transmits picture data after being coded for division into a predetermined number of blocks, comprising: edge detection means for detecting a presence of an edge in each one of said blocks; discrete cosine transform means for discrete cosine transforming said picture data for each one of said blocks of said picture data, when the presence of an edge is not detected by said edge detection means; and Wavelet transform means for Wavelet transforming each one of said blocks of said picture data, when the presence of an edge is detected by said edge detection means.
Claim 2
Dependent Claim
101 words
A picture data processing apparatus which transmits picture data after being coded for division into a predetermined number of blocks, comprising: edge detection means for detecting a presence of an edge in each one of said blocks; discrete cosine transform means for discrete cosine transforming said picture data for each one of said blocks of said picture data, when the presence of an edge is not detected by said edge detection means; and Wavelet transform means for Wavelet transforming each one of said blocks of said picture data, when the presence of an edge is detected by said edge detection means.
Claim 3
Dependent Claim
32 words
The picture data processing apparatus according to claim 1, wherein said Wavelet transform means is comprised of Haar transform means for Haar transforming each one of said blocks of said picture data.
Claim 4
Dependent Claim
73 words
A picture data processing method in which picture data is transmitted after being coded for division into a predetermined number of blocks, comprising the steps of: detecting a presence of an edge in each one of said blocks; discrete cosine transforming said picture data for each one of said blocks, when the presence of an edge is not detected; and Wavelet transforming said picture data, when the presence of an edge is detected.
Claim 5
Dependent Claim
73 words
A picture data processing method in which picture data is transmitted after being coded for division into a predetermined number of blocks, comprising the steps of: detecting a presence of an edge in each one of said blocks; discrete cosine transforming said picture data for each one of said blocks, when the presence of an edge is not detected; and Wavelet transforming said picture data, when the presence of an edge is detected.
Claim 6
Dependent Claim
23 words
The picture data processing method according to claim 3, wherein said Wavelet transform is a Haar transform for each one of said blocks.
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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) | 1998-03-13 | 1998-09-12 | 1999-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-13 | 2002-09-12 | 2003-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-13 | 2006-09-12 | 2007-03-14 | $7700.00 | Window Closed / Lapsed |