EP0576289A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Encoding and decoding picture signals
Assignee: Sony Corp
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Filing: 1993-06-24
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Granted: —
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Expires: 2013-06-24
Abstract
Abstract Picture-signal encoding methods and systems are provided for encoding interlaced scan picture signals. A first one of a pair (P6,P7) of interlaced odd and even fields of one frame, as well as a field (P3) of another frame are encoded. The second one of the pair (B4,B5) of interlaced odd and even fields is encoded such that at least a portion is encoded predictively from one of the other two fields. Decoding methods and systems are provided for decoding the picture-signal encoded as described above.
Inventors
- 👤 Yoichi c/o Patent Division Yagasaki
- 👤 Jun c/o Patent Division Yonemitsu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 11:34
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/79; H04N9/80; H04N9/804; H04N9/8042; H04N9/8047; H04N19/00; H04N19/50; H04N19/587; H04N19/10; H04N19/102; H04N19/103; H04N19/105; H04N19/112; H04N19/134; H04N19/136; H04N19/137; H04N19/503; H04N19/51; H04N19/577; H04N19/60; H04N19/61; H04N5/00; H04N5/76; H04N5/91; H04N5/92; H04N5/84; H04N5/85
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
129 words
A picture-signal encoding method for encoding interlaced scan picture signals including a plurality of frames, each frame including a pair of interlaced odd and even fields, comprising the steps of: encoding a first one of a pair of interlaced odd and even fields or one of said plurality of frames; encoding a field of another one of said plurality of frames; and encoding the second one of said pair of interlaced odd and even fields such that at least a portion of said second one of said pair of interlaced odd and even fields is encoded predictively from at least a portion of one of said first one of said pair of interlaced odd and even fields and said field of said another one of said plurality of frames.
Claim 2
Dependent Claim
40 words
The method of claim 1, wherein the first and second ones of said pair of interlaced odd and even fields are encoded during respective field encoding intervals arranged one after the other within a predetermined sequence of field encoding intervals.
Claim 3
Dependent Claim
76 words
The method of claim 2, wherein said one of said first one of said pair of interlaced odd and even fields and said field of said another one of said plurality of frames is encoded in a predetermined mode by selecting at least one encoding technique from a predetermined encoding technique set including an intrafield encoding technique and an interfield encoding technique utilizing predictions from single fields while avoiding encoding thereof through a bidirectionally-predictive encoding technique.
Claim 4
Dependent Claim
121 words
The method of claim 3, wherein the step of encoding said portion of said second one of said pair of interlaced odd and even fields comprises forming a prediction thereof from a portion of a field from a further one of said plurality of frames encoded in a predetermined mode, said one of said first one of said pair of interlaced odd and even fields and said field of said another one of said plurality of frames, and said field from a further one of said plurality of frames being those two fields among all encoded fields which are encoded most recently with respect to said second one of said pair of interlaced odd and even fields in said predetermined mode.
Claim 5
Dependent Claim
130 words
The method of claim 1, wherein said at least a portion of said second one of said pair of interlaced odd and even fields is encoded through a bidirectionally-predictive encoding technique utilizing predictions from four fields including said field of said another one of said plurality of frames, said four fields each being encoded in a predetermined mode by selecting at least one encoding technique from a predetermined encoding technique set including an intrafield encoding technique and an interfield encoding technique utilizing predictions from single fields, while avoiding encoding thereof through a bidirectionally-predictive encoding technique, said four fields being the four fields among all encoded fields which are encoded most recently with respect to said second one of said pair of interlaced odd and even fields in said predetermined mode.
Claim 6
Dependent Claim
40 words
The method of claim 5, wherein said first and second ones of said pair of interlaced odd and even fields are encoded during respective field encoding intervals arranged one after the other within a predetermined sequence of field encoding intervals.
Claim 7
Dependent Claim
129 words
The method of claim 1, wherein said at least a portion of said second one of said pair of interlaced odd and even fields is encoded through a bidirectionally-predictive encoding technique utilizing predictions from three fields including said field of said another one of said plurality of frames, said three fields each being encoded ina predetermined mode by selecting at least one encoding technique from a predetermined encoding technique set including an intrafield encoding technique and an interfield encoding technique utilizing prediction from single fields, while avoiding encoding thereof through a bidirectionally-predictive encoding technique, said three fields being the three fields among all encoded fields which are encoded most recently with respect to said second one of said pair of interlaced odd and even fields in said predetermined mode.
Claim 8
Dependent Claim
40 words
The method of claim 7, wherein said first and second ones of said pair of interlaced odd and even fields are encoded during respective field encoding intervals arranged one after the other within a predetermined sequence of field encoding intervals.
Claim 9
Dependent Claim
145 words
The method of claim 1, wherein said field of said another one of said plurality of frames is encoded by selecting at least one encoding technique from a predetermined encoding technique set including an intrafield encoding technique and an interfield encoding technique utilizing predictions from single fields, while avoiding encoding of said field of said another one of said plurality of frames through bidirectionally-predictive encoding; wherein said pair of interlaced odd and even fields precedes said field of said another one of said plurality of frames, at least a portion of each of said first and second ones of said pair of interlaced odd and even fields being encoded using a bidirectionally-predictive encoding technique; and further comprising the step of encoding at least a portion of a field succeeding said field of said another one of said plurality of frames using a bidirectionally-predictive encoding technique.
Claim 10
Dependent Claim
123 words
The method of claim 9, wherein the bidirectionally-predicted portions of each of the first and second ones of said pair of interlaced odd and even fields and said field succeeding said field of said another one of said plurality of frames are each bidirectionally-predicted from four fields, said four fields each being encoded in a predetermined mode by selecting at least one encoding technique from a predetermined encoding technique set including an intrafield encoding technique and an interfield encoding technique utilizing predictions from single fields, while avoiding encoding thereof through a bidirectionally-predictive encoding technique, said four fields from which the portion of each of the fields is bidirectionally-predicted being those fields which are encoded most recently with respect thereto in said predetermined mode.
Claim 11
Dependent Claim
98 words
The method of claim 1, wherein the first one of said pair of interlaced odd and even fields is encoded by an intrafield encoding technique, while avoiding the use of an interfield encoding technique therefor, and wherein the second one of said pair of interlaced odd and even fields is encoded by selecting at least one encoding technique from a predetermined encoding technique set including an intrafield encoding technique and an interfield encoding technique utilizing predictions from single fields, while avoiding encoding of said second one of said pair of interlaced odd and even fields through bidirectionally-predictive encoding.
Claim 12
Dependent Claim
58 words
The method of claim 1, wherein the first and second ones of said pair of interlaced odd and even fields are each encoded by selecting at least one encoding technique from a predetermined encoding technique set including an intrafield encoding technique and an interfield encoding technique utilizing predictions from single fields, while avoiding encoding thereof through bidirectionally-predictive encoding.
Claim 13
Dependent Claim
33 words
The method of claim 1, wherein at least a portion of each of the first and second ones of said pair of interlaced odd and even fields are each encoded through bidirectionally-predictive encoding.
Claim 14
Dependent Claim
207 words
A picture-signal decoding method for decoding interlaced scan picture signals including a plurality of frames, each frame including a pair of interlaced odd and even fields, the interlaced scan signals including a first one of a pair of interlaced odd and even fields of one of said plurality of frames, a field of another one of said plurality of frames, and a second one of said pair of interlaced odd and even fields in which a portion thereof is encoded predictively from at least a portion of one of said first one of said pair of interlaced odd and even fields and said field of said another one of said plurality of frames, comprising the steps of: decoding the first one of said pair of interlaced odd and even fields of said one of said plurality of frames; decoding the field of said another one of said plurality of frames; and decoding the second one of said pair of interlaced odd and even fields, including decoding said portion thereof predictively by forming a prediction thereof based on said portion of said one of said first one of said pair of interlaced odd and even fields and said field of said another one of said plurality of frames.
Claim 15
Dependent Claim
40 words
The method of claim 14, wherein the first and second ones of said pair of interlaced odd and even fields are decoded during respective field decoding intervals arranged one after the other within a predetermined sequence of field decoding intervals.
Claim 16
Dependent Claim
92 words
The method of claim 15, wherein the step of decoding the second one of said pair of interlaced odd and even fields comprises forming a prediction of the portion thereof from each of two fields of said interlaced scan picture signals, said each of said two fields of said interlaced scan picture signals being encoded by selecting at least one encoding technique from a predetermined encoding technique set including an intrafield encoding technique and an interfield encoding technique utilizing predictions from single fields while avoiding encoding thereof through a bidirectionally-predictive encoding technique.
Claim 17
Dependent Claim
130 words
The method of claim 14, wherein said at least a portion of said second one of said pair or interlaced odd and even field: is encoded through a bidirectionally-predictive encoding technique utilizing predictions from four fields including said field of said another one of said plurality of frames, said four fields each being encoded in a predetermined mode by selecting at least one encoding technique from a predetermined encoding technique set including an intrafield encoding technique and an interfield encoding technique utilizing predictions from single fields, while avoiding encoding thereof through a bidirectionally-predictive encoding technique, said four fields being the four fields among all encoded fields which are encoded most recently with respect to said second one of said pair of interlaced odd and even fields in said predetermined mode.
Claim 18
Dependent Claim
40 words
The method of claim 17, wherein said first and second ones of said pair of interlaced odd and even fields are decoded during respective field decoding intervals arranged one after the other within a predetermined sequence of field decoding intervals.
Claim 19
Dependent Claim
130 words
The method of claim 14, wherein said at least a portion of said second one of said pair of interlaced odd and even fields is encoded through a bidirectionally-predictive encoding technique utilizing predictions from three fields including said field of said another one of said plurality of frames, said three fields each being encoded in a predetermined mode by selecting at least one encoding technique from a predetermined encoding technique set including an intrafield encoding technique and an interfield encoding technique utilizing predictions from single fields, while avoiding encoding thereof through a bidirectionally-predictive encoding technique, said three fields being the three fields among all encoded fields which are encoded most recently with respect to said second one of said pair of interlaced odd and even fields in said predetermined mode.
Claim 20
Dependent Claim
40 words
The method of claim 20, wherein said first and second ones of said pair of interlaced odd and even fields are decoded during respective field decoding intervals arranged one after the other within a predetermined sequence of field decoding intervals.
Claim 21
Dependent Claim
258 words
The method of claim 14, wherein said field of said another one of said plurality of frames is encoded by selecting at least one encoding technique from a predetermined encoding technique set including an intrafield encoding technique and an interfield encoding technique utilizing predictions from single fields, while avoiding encoding of said field of said another one of said plurality of frames through bidirectionally-predictive encoding; wherein said pair of interlaced odd and even fields precedes said field of said another one of said plurality of frames, at least a portion of each of said first and second ones of said pair of interlaced odd and even fields being encoded using a bidirectionally-predictive encoding technique; and wherein said interlaced scan picture signals include a field succeeding said field of said another one of said plurality of frames, the succeeding field having at least a portion thereof encoded using a bidirectionally-predictive encoding technique, wherein the step of decoding said field of said another one of said plurality of frames comprises carrying out at least one of an intrafield decoding technique and an interfield decoding technique utilizing at least one prediction from a single field; the steps of decoding the first and second ones of said pair of interlaced odd and even fields comprises forming predictions of said at least a portion of each thereof through bidirectional-prediction; and further comprising the step of decoding said field succeeding said field of said another one of said plurality of frames comprises forming a prediction of said at least a portion thereof utilizing bidirectional-prediction.
Claim 22
Dependent Claim
189 words
The method of claim 21, wherein the bidirectionally-predicted portions of each of the first and second ones of said pair of interlaced odd and even fields and said field succeeding said field of said another one of said plurality of frames are each bidirectionally-predicted from four fields, said four fields each being encoded in a predetermined mode by selecting at least one encoding technique from a predetermined encoding technique set including an intrafield encoding technique and an interfield encoding technique utilizing predictions from single fields, while avoiding encoding thereof through a bidirectionally-predictive encoding technique, said four fields from which the portion of each of the fields is bidirectionally-predicted being those fields which are encoded most recently with respect thereto in said predetermined mode, wherein the steps of decoding the first and second ones of said pair of interlaced odd and even fields and said field succeeding said field of said another one of said plurality of frames comprise forming prediction of said at least a portion of each thereof using data of the four most recently decoded fields among those previously encoded with respect thereto in said predetermined mode.
Claim 23
Independent Claim
150 words
A device-readable record storing interlaced scan picture signals including a plurality of frames, each frame including a pair of interlaced odd and even fields, comprising: a record medium; a first one of a pair of interlaced odd and even fields of one of said plurality of frames stored on said record medium in encoded form; a field of another one of said plurality of frames stored on said record medium in encoded form; and a second one of said pair of interlaced odd and even fields stored on said record medium in encoded form, the second one of said pair of interlaced odd and even fields being encoded such that at least a portion thereof is encoded predictively from at least a portion of one of said first one of said pair of interlaced odd and even fields and said field of said another one of said plurality of frames.
Claim 24
Dependent Claim
42 words
The device-readable record according to claim 23, wherein the first and second ones of said pair of interlaced odd and even fields are encoded during respective field encoding intervals arranged one after the other within a predetermined sequence of field encoding intervals.
Claim 25
Dependent Claim
78 words
The device-readable record according to claim 24, wherein said one of said first one of said pair of interlaced odd and even fields and said field of said another one of said plurality of frames is encoded in a predetermined mode by selecting at least one encoding technique from a predetermined encoding technique set including an intrafield encoding technique and an interfield encoding technique utilizing predictions from single fields while avoiding encoding thereof through a bidirectionally-predictive encoding technique.
Claim 26
Dependent Claim
121 words
The device-readable record according to claim 25, wherein said portion of said second one said pair of interlaced odd and even fields is formed with the use of prediction thereof from a portion of a field from a further one of said plurality of frames encoded in said predetermined mode, said one of said first one of said pair of interlaced odd and even fields and said field of said another one of said plurality of frames, and said field from a further one of said plurality of frames being those two fields among all encoded fields which are encoded most recently with respect to said second one of said pair of interlaced odd and even fields in said predetermined mode.
Claim 27
Dependent Claim
131 words
The device-readable record according to claim 23, wherein said at least a portion of said second one of said pair of interlaced odd and even fields is encoded through a bidirectionally-predictive encoding technique utilizing predictions from four fields including said field of said another one of said plurality of frames, said four fields each being encoded in a predetermined mode by selecting at least one encoding technique from a predetermined encoding technique set including an intrafield encoding technique and an interfield encoding technique utilising predictions from single fields, while avoiding encoding thereof through a bidirectionally-predictive encoding technique, said four fields being the four fields among all encoded fields which are encoded most recently with respect to said second one of said pair of interlaced odd and even in said predetermined mode.
Claim 28
Dependent Claim
42 words
The device-readable record according to claim 27, wherein said first and second ones of said pair of interlaced odd and even field are encoded during respective field encoding intervals arranged one after the other within a predetermined sequence of field encoding intervals.
Claim 29
Dependent Claim
133 words
The device-readable record according to claim 23, wherein said at least a portion of said second one of said pair of interlaced odd and even fields is encoded through a bidirectionally-predictive encoding technique utilizing predictions from three fields including said field of said another one of said plurality of frames, said three fields each being encoded in a predetermined mode by selecting at least one encoding technique from a predetermined encoding technique set including an intrafield encoding technique and an interfield encoding technique utilizing predictions from single fields, while avoiding encoding thereof through a bidirectionally- predictive encoding technique, said three fields being the three fields among all encoded fields which are encoded most recently with respect to said second one of said pair of interlaced odd and even fields in said predetermined mode.
Claim 30
Dependent Claim
42 words
The device-readable record according to claim 29, wherein said first and second ones of said pair of interlaced odd and even fields are encoded during respective field encoding intervals arranged one after the other within a predetermined sequence of field encoding intervals.
Claim 31
Dependent Claim
170 words
The device-readable record according to claim 23, wherein said field of said another one of said plurality of frames is encoded by selecting at least one encoding technique from a predetermined encoding technique set including an intrafield encoding technique and an interfield encoding technique utilizing predictions from single fields, while avoiding encoding of said field of said another one of said plurality of frames through bidirectionally-predictive encoding; wherein said pair of interlaced odd and even fields precedes said field of said another one of said plurality of frames, at least a portion of each of said first and second ones of said pair of interlaced odd and even fields being encoded using a bidirectionally-predictive encoding technique; and the device-readable record further comprising a field succeeding said field of said another one of said plurality of frames stored on said record medium in encoded form, at least a portion of said field succeeding said field of said another one of said plurality of frames being encoded using a bidirectionally-predictive encoding technique.
Claim 32
Dependent Claim
124 words
The device-readable record according to claim 31, wherein the bidirectionally-predicted portions of each of the first and second ones of said pair of interlaced odd and even fields and said field succeeding said field of said another one of said plurality of frames are each bidirectionally-predicted from four fields, said four fields each being encoded in a predetermined mode by selecting at least one encoding technique from predetermined encoding technique set including an intrafield encoding technique and an interfield encoding technique utilizing predictions from single fields, while avoiding encoding thereof through a bidirectionally-predictive encoding technique, said four fields from which the portion of each of the fields is bidirectionally-predicted being those fields which are encoded most recently with respect thereto in said predetermined mode.
Claim 33
Dependent Claim
133 words
A picture-signal encoding system for encoding interlaced scan picture signals including a plurality of frames, each frame including a pair of interlaced odd and even fields, comprising: means for encoding a first one of a pair of interlaced odd and even fields of one of said plurality of frames; means for encoding a field of another one of said plurality of said frames; and means for encoding the second one of said pair of interlaced odd and even fields such that at least a portion of said second one of said pair of interlaced odd and even fields is encoded predictively from at least a portion of one of said first one of said pair of interlaced odd and even fields and said field of said another one of said plurality of frames.
Claim 34
Dependent Claim
56 words
The picture-signal encoding system of claim 33, wherein the means for encoding the first and second ones of said pair of interlaced odd and even fields is operative to encode the first and second ones of said pair during respective field encoding intervals arranged one after the other within a predetermined sequence of field encoding intervals.
Claim 35
Dependent Claim
209 words
A picture-signal decoding system for decoding interlaced scan picture signals including a plurality of frames, each frame including pair of interlaced odd and even fields, the interlaced scan signals including a first one of a pair of interlaced odd and even fields of one of said plurality of frames, a field of another one of said plurality of frames, and a second one of said pair of interlaced odd and even fields in which a portion thereof is encoded predictively from at least a portion of one of said first one of said pair of interlaced odd and even fields and said field of said another one of said plurality of frames, comprising: means for decoding the first one of said pair of interlaced odd and even fields of said one of said plurality of frames; means for decoding the field of said another one of said plurality of frames; and means for decoding the second one of said pair of interlaced odd and even fields, including decoding said portion thereof predictively by forming a prediction thereof based on said portion of said one of said first one of said pair of interlaced odd and even fields and said field of said another one of said plurality of frames.
Claim 36
Dependent Claim
62 words
The picture-signal decoding system of claim 35, wherein the means for decoding the first and second ones of said pair of interlaced odd and even fields is operative to decode said first and second ones of said pair of interlaced odd and even fields during respective field decoding intervals arranged one after the other within a predetermined sequence of field decoding intervals.
Claim 37
Independent Claim
149 words
A system for encoding interlaced scan picture signals including a plurality of frames, each frame including a pair of interlaced odd and even fields, comprising: encoding means having an input for receiving picture signals for encoding said picture signals in compressed form; local decoding means for decoding the compressed, encoded picture signals to provide decoded picture signals; field memory means for storing a field of the decoded picture signals; means for receiving a current field of the interlaced odd and even fields to be encoded; means for forming a predicted picture signal representing at least a portion of the current field based on the field stored in said field memory means; and subtracting means for subtracting said predicted picture signal from said at least a portion of the current field to form a prediction error picture signal; said encoding means being operative to encode said prediction error picture signal.
Claim 38
Independent Claim
121 words
A system for decoding compressed, encoded interlaced scan picture signals including a plurality of frames, each frame including a pair of interlaced odd and even fields, at least some of the fields including portions encoded predictively, comprising: means for decoding the compressed, encoded picture signals to produce decoded picture signals; encoding mode detection means for detecting predictively encoded portions of the encoded picture signals to produce a detection signal; adding means for adding a predicted signal to the decoded picture signals to produce output picture signals; field memory means for storing a field of said output picture signals; and means for producing said predicted signal based on the stored field of said output picture signals in response to said detection signal.
References Cited (Backward Citations)
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