EP0159506A2
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EP
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Apparatus for band compression processing of a picture signal
Assignee: Fujitsu Ltd
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Filing: 1985-03-08
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Granted: —
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Expires: 2005-03-08
Abstract
Abstract An apparatus for band compression processing of a picture signal which generates forecasting error signal (block 3) and movement vector (block 1) and updates only the movement vector during a comb-out operation. During comb-out processing, a picture signal is recirculated (block 5) while the movement vector is produced and accumulated (block 11). At the end of the comb-out processing, the change in the movement vector from the accumulated vector is within a desired range. Therefore, a scale of circuit does not increase for detecting the movement vector after the comb-out operation.
Inventors
- 👤 Kiichi Matsuda
- 👤 Toshitaka Tsuda
- 👤 Toshihiro Homma
- 👤 Hiroshi Fukuda
- 👤 Takeshi Okazaki
- 👤 Shin-Ichi Maki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 09:05
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/41; H04N19/00; H04N19/42; H04N19/43; G; G06; G06T; G06T7/00; G06T7/20; G06T7/223; H04N1/40; H04N19/10; H04N19/134; H04N19/146; H04N19/152; H04N19/50; H04N19/503; H04N19/51; G06T2207/00; G06T2207/10; G06T2207/10016
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
88 words
An apparatus for band compression processing of a picture signal, characterised by: forecasting error signal generation means (3) for generating a forecasting error signal from a difference between an input picture signal and a forecasted value; movement vector generation means (1) for generating a movement vector from a comparison between input picture signal blocks and reference blocks of a preceding picture signal; and update means (11) operatively connected to said movement vector generation means (1), for updating an initial value of said movement vector during a comb-out operation.
Claim 2
Independent Claim
88 words
An apparatus for band compression processing of a picture signal, characterised by: forecasting error signal generation means (3) for generating a forecasting error signal from a difference between an input picture signal and a forecasted value; movement vector generation means (1) for generating a movement vector from a comparison between input picture signal blocks and reference blocks of a preceding picture signal; and update means (11) operatively connected to said movement vector generation means (1), for updating an initial value of said movement vector during a comb-out operation.
Claim 3
Dependent Claim
72 words
An apparatus according to claim 1, wherein said movement vector generation means (1) comprises: reference block generation means (23), operatively connected to said forecasting error signal generation means (3), for generating a r.eference block from the forecasted value and forecasting error signal; and comparison means (24-1...24-n, 25), operatively connected to said reference block generation means (23), for comparing the input picture signal blocks with the reference blocks and generating the movement vector.
Claim 4
Dependent Claim
50 words
An apparatus according to claim 2, wherein said reference block generation means (23) includes means for generating a new picture signal corresponding to a preceding picture from the forecasted value and forecasting error signal, wherein the forecasted value is formed by moving the preceding picture according to the movement vector.
Claim 5
Dependent Claim
75 words
An apparatus according to claim 1, further comprising: storage means (7), operatively connected to said forecasting error signal generation means (3), for storing the forecasting error signal and for outputting the forecasting error signal at a rate corresponding to a rate of transmission path; and supervision means (10), operatively connected to said storage means (7), for supervising said storage means (7) and for controlling the comb-out operation to prevent overflow of said storage means (7).
Claim 6
Dependent Claim
103 words
An apparatus according to claim 4, further comprising: first interception means (8), operatively connected to said forecasting error signal generation means (3) and said storage means (7), and controlled by an output of said supervision means (10), for intercepting to provide the forecasting error signal for said storage means (7) during the comb-out operation; and second interception means (9), operatively connected to said forecasting error signal generation means (3), and controlled by an output of said supervision means (10), for intercepting to provide the forecasted value for said forecasting error signal generation means (3) and providing the preceding picture during the comb-out operation.
Claim 7
Dependent Claim
58 words
An apparatus according to claim 5, wherein said update means comprises memory means (11), operatively connected to said movement vector generation means (1), for memorizing and updating the movement vector during the comb-out operation and for providing an updated movement vector for said forecasting error signal generation means (3) at the first operation thereof after the comb-out operation.
Claim 8
Dependent Claim
61 words
A band compression apparatus for processing a picture signal during comb-out processing, characterised by: movement vector generation means (1) for generating a movement vector indicating a difference in movement between a present picture signal and a previous picture signal; and accumulation means (11, 12), operatively connected to said movement vector generation means (1), for accumulating movement vectors during the comb-out processing.
Claim 9
Dependent Claim
61 words
A band compression apparatus for processing a picture signal during comb-out processing, characterised by: movement vector generation means (1) for generating a movement vector indicating a difference in movement between a present picture signal and a previous picture signal; and accumulation means (11, 12), operatively connected to said movement vector generation means (1), for accumulating movement vectors during the comb-out processing.
Claim 10
Dependent Claim
45 words
An apparatus according to claim 7, further comprising forecasting error signal generation means (3), operatively connected to said movement vector generation means (1), for producing a forecasted error signal from the accumulated movement vector and the present picture signal at the end of comb-out processing.
Claim 11
Dependent Claim
40 words
An apparatus according to claim 7, further comprising recirculation means (5), operatively connected to said movement vector generation means (1), for recirculating the previous picture signal and applying the recirculated previous picture signal to said movement vector generation means (1).
Claim 12
Dependent Claim
65 words
An apparatus according to claim 9, wherein said recirculation means comprises: a frame memory (5) operatively connected to said movement vector generation means (1); and a selector (9) having inputs operatively connected to said frame memory (5) and said movement vector generation means (1) and an output operatively connected to said frame memory (5), for selecting the input from said frame memory during comb-out processing.
Claim 13
Dependent Claim
46 words
An apparatus according to claim 7, wherein said accumulation means comprises: a selector (12) operatively connected to said movement vector generation means (1); and an accumulating memory (11), operatively connected to said selector (12) and said movement vector generation means (1), for accumulating the movement vectors.
References Cited (Backward Citations)
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