US5647049A
Expired / Lapsed
US
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Video recording/reproducing apparatus which uses a differential motion vector determined using two other motion vectors
Assignee: Toshiba Corp
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Filing: 1995-04-28
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Granted: 1997-07-08
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Expires: 2015-04-28
Abstract
Abstract A video recording/reproducing apparatus having an encoder for encoding a video signal, and a recording unit for recording encoded information from the encoder on a digital recording medium, the encoder comprising a memory for storing at least first and second reference pictures, a prediction circuit for forming a prediction signal for an input signal, using a first reference signal from the first reference picture designated by a first motion vector, and a second reference signal from the second reference picture designated by a second motion vector, a first motion vector detector for determining a third motion vector from a point of intersection of the first motion vector and the second motion vector to a point in the second reference picture where the first motion vector intersects the second reference picture, a second motion vector detector for determining a differential motion vector by subtracting the third motion vector from the second motion vector, and an encoding circuit for encoding the first motion vector and the differential motion vector to obtain encoded first motion vector data and encoded differential motion vector data, and for encoding a difference signal between the prediction signal and the input signal to obtain encoded difference data.
Inventors
- 👤 Toshinori Odaka
- 👤 Yoshiharu Uetani
- 👤 Tadaaki Masuda
- 👤 Tomoo Yamakage
- 👤 Hideyuki Ueno
- 👤 Noboru Yamaguchi
- 👤 Yoshihiro Kikuchi
- 👤 Tadahiro Oku
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:50
CPC Classifications
H; H04; H04N; H04N19/00; H04N19/50; H04N19/503; H04N19/51; H04N19/577; H04N19/10; H04N19/102; H04N19/103; H04N19/105; H04N19/107; H04N19/112; H04N19/124; H04N19/126; H04N19/134; H04N19/136; H04N19/137; H04N19/146; H04N19/152; H04N19/157; H04N19/159; H04N19/16; H04N19/169; H04N19/17; H04N19/174; H04N19/176; H04N19/523; H04N19/58; H04N19/60; H04N19/61; H04N19/80; H04N19/82; H04N19/149; H04N19/15
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
210 words
A video recording/reproducing apparatus having an encoder for encoding a video signal, and a recording unit for recording encoded information from said encoder on a digital recording medium, said encoder comprising: memory means for storing at least first and second reference pictures; prediction signal forming means for forming a prediction signal for an input signal, using a first reference signal from the first reference picture stored in said memory means as designated by a first motion vector, and a second reference signal from the second reference picture stored in said memory means as designated by a second motion vector; first determining means for determining a third motion vector from a point of intersection of the first motion vector and the second motion vector to a point in the second reference picture where said first motion vector intersects the second reference picture; second determining means for determining a differential motion vector by subtracting the third motion vector from the second motion vector; first encoding means for encoding the first motion vector and the differential motion vector to obtain encoded first motion vector data and encoded differential motion vector data; and second encoding means for encoding a difference signal between said prediction signal and said input signal to obtain encoded difference data.
Claim 2
Dependent Claim
210 words
A video recording/reproducing apparatus having an encoder for encoding a video signal, and a recording unit for recording encoded information from said encoder on a digital recording medium, said encoder comprising: memory means for storing at least first and second reference pictures; prediction signal forming means for forming a prediction signal for an input signal, using a first reference signal from the first reference picture stored in said memory means as designated by a first motion vector, and a second reference signal from the second reference picture stored in said memory means as designated by a second motion vector; first determining means for determining a third motion vector from a point of intersection of the first motion vector and the second motion vector to a point in the second reference picture where said first motion vector intersects the second reference picture; second determining means for determining a differential motion vector by subtracting the third motion vector from the second motion vector; first encoding means for encoding the first motion vector and the differential motion vector to obtain encoded first motion vector data and encoded differential motion vector data; and second encoding means for encoding a difference signal between said prediction signal and said input signal to obtain encoded difference data.
Claim 3
Dependent Claim
44 words
The video recording/reproducing apparatus according to claim 1, wherein said recording unit is constituted by an optical disk unit for optically writing said first vector data, said differential vector data and said difference data on an optical disk serving as said digital recording medium.
Claim 4
Dependent Claim
72 words
The video recording/reproducing apparatus according to claim 1, wherein said recording unit is constituted by an optical disk unit comprising a laser beam generator for generating a write laser beam in accordance with said first vector data, said differential vector data and said difference data, and optical means for converging said write laser beam on an optical disk serving as said digital recording medium, thereby writing said data on said optical disk.
Claim 5
Dependent Claim
20 words
The video recording/reproducing apparatus according to claim 1, wherein said differential motion vector is encoded to a variable length code.
Claim 6
Dependent Claim
37 words
The video recording/reproducing apparatus according to claim 1, wherein said differential motion vector is limited within a range of values obtained only when the directions of the first and second motion vectors are close to each other.
Claim 7
Dependent Claim
20 words
The video recording/reproducing apparatus according to claim 5, wherein said differential motion vector is encoded to a variable length code.
Claim 8
Dependent Claim
213 words
A video recording/reproducing apparatus having an encoder for encoding a video signal, and a recording unit for recording encoded information from said encoder on a digital recording medium, said encoder comprising: memory means for storing at least first and second reference pictures; prediction signal forming means for forming a prediction signal for an input signal, using a first reference signal from the first reference picture stored in said memory means as designated by a first motion vector, and a second reference signal from the second reference picture stored in said memory means as designated by a second motion vector; first determining means for determining a third motion vector from a point of intersection of the first motion vector and the second motion vector to a pixel in the second reference picture closest to a point in the second reference picture where said first motion vector intersects the second reference picture; second determining means for determining a differential motion vector by subtracting the third motion vector from the second motion vector; first encoding means for encoding the first motion vector and the differential motion vector to obtain encoded first motion vector data; and second encoding means for encoding a difference signal between said prediction signal and said input signal to obtain encoded difference data.
Claim 9
Dependent Claim
213 words
A video recording/reproducing apparatus having an encoder for encoding a video signal, and a recording unit for recording encoded information from said encoder on a digital recording medium, said encoder comprising: memory means for storing at least first and second reference pictures; prediction signal forming means for forming a prediction signal for an input signal, using a first reference signal from the first reference picture stored in said memory means as designated by a first motion vector, and a second reference signal from the second reference picture stored in said memory means as designated by a second motion vector; first determining means for determining a third motion vector from a point of intersection of the first motion vector and the second motion vector to a pixel in the second reference picture closest to a point in the second reference picture where said first motion vector intersects the second reference picture; second determining means for determining a differential motion vector by subtracting the third motion vector from the second motion vector; first encoding means for encoding the first motion vector and the differential motion vector to obtain encoded first motion vector data; and second encoding means for encoding a difference signal between said prediction signal and said input signal to obtain encoded difference data.
Claim 10
Dependent Claim
44 words
The video recording/reproducing apparatus according to claim 7, wherein said recording unit is constituted by an optical disk unit for optically writing said first vector data, said differential vector data and said difference data on an optical disk serving as said digital recording medium.
Claim 11
Dependent Claim
72 words
The video recording/reproducing apparatus according to claim 7, wherein said recording unit is constituted by an optical disk unit comprising a laser beam generator for generating a write laser beam in accordance with said first vector data, said differential vector data and said difference data, and optical means for converging said write laser beam on an optical disk serving as said digital recording medium, thereby writing said data on said optical disk.
Claim 12
Dependent Claim
20 words
The video recording/reproducing apparatus according to claim 7, wherein said differential motion vector is encoded to a variable length code.
Claim 13
Dependent Claim
37 words
The video recording/reproducing apparatus according to claim 7, wherein said differential motion vector is limited within a range of values obtained only when the directions of the first and second motion vectors are close to each other.
Claim 14
Dependent Claim
20 words
The video recording/reproducing apparatus according to claim 11, wherein said differential motion vector is encoded to a variable length code.
Claim 15
Dependent Claim
233 words
A video recording/reproducing apparatus comprising: an information reproducing unit for reproducing encoded data recorded on a digital recording medium, said encoded data including a first motion vector from a third picture to a first reference picture and a differential motion vector, said differential motion vector having been produced during encoding by determining a second motion vector from the third picture to a second reference picture, determining a third motion vector from a point of intersection of the first motion vector and the second motion and the second motion vector to a point where said first motion vector intersects the second reference picture, and subtracting the third motion vector from the second motion vector to derive said differential motion vector; and a decoder for decoding the coded information reproduced by said reproducing unit from the digital recording medium, said decoder comprising: receiving means for receiving the encoded signal including the first motion vector and the differential motion vector; means for extracting the first motion vector and the differential motion vector from the received encoded signal; determining means for determining a decoded third motion vector extending from the third picture to be predicted to a point in the second reference picture where the extracted first motion vector intersects the second reference picture; and determining means for determining a decoded second motion vector by adding the extracted differential motion vector and the decoded third motion vector.
Claim 16
Dependent Claim
233 words
A video recording/reproducing apparatus comprising: an information reproducing unit for reproducing encoded data recorded on a digital recording medium, said encoded data including a first motion vector from a third picture to a first reference picture and a differential motion vector, said differential motion vector having been produced during encoding by determining a second motion vector from the third picture to a second reference picture, determining a third motion vector from a point of intersection of the first motion vector and the second motion and the second motion vector to a point where said first motion vector intersects the second reference picture, and subtracting the third motion vector from the second motion vector to derive said differential motion vector; and a decoder for decoding the coded information reproduced by said reproducing unit from the digital recording medium, said decoder comprising: receiving means for receiving the encoded signal including the first motion vector and the differential motion vector; means for extracting the first motion vector and the differential motion vector from the received encoded signal; determining means for determining a decoded third motion vector extending from the third picture to be predicted to a point in the second reference picture where the extracted first motion vector intersects the second reference picture; and determining means for determining a decoded second motion vector by adding the extracted differential motion vector and the decoded third motion vector.
Claim 17
Dependent Claim
46 words
The video recording/reproducing apparatus according to claim 13, wherein said information reproducing unit is constituted by an optical disk unit for optically reproducing said first vector data, said differential vector data and said difference data written on an optical disk serving as said digital recording medium.
Claim 18
Dependent Claim
69 words
The video recording/reproducing apparatus according to claim 13, wherein said information reproducing unit is constituted by a laser beam generator for generating a read laser beam, optical means for converging said read laser beam on an optical disk serving as said digital recording medium, thereby reproducing the encoded data from the optical disk, and a photosensor for converting a reflection beam from said optical disk to a coded signal.
Claim 19
Dependent Claim
20 words
The video recording/reproducing apparatus according to claim 13, wherein said differential motion vector is encoded to a variable length code.
Claim 20
Dependent Claim
37 words
The video recording/reproducing apparatus according to claim 13, wherein said differential motion vector is limited within a range of values obtained only when the directions of the first and second motion vectors are close to each other.
Claim 21
Dependent Claim
20 words
The video recording/reproducing apparatus according to claim 17, wherein said differential motion vector is encoded to a variable length code.
Claim 22
Dependent Claim
239 words
A video recording/reproducing apparatus comprising: an information reproducing unit for reproducing encoded data recorded on a digital recording medium, said encoded data including a first motion vector from a third picture to a first reference picture and a differential motion vector, said differential motion vector having been produced during encoding by determining a second motion vector from the third picture to a second reference picture, determining a third motion vector from a point of intersection of the first motion vector and the second motion and the second motion vector to a point where said first motion vector intersects the second reference picture, and subtracting the third motion vector from the second motion vector to derive said differential motion vector; and a decoder for decoding the encoded information reproduced by said information reproducing unit, said decoding apparatus comprising: receiving means for receiving the encoded signal including the first motion vector and the differential motion vector; means for extracting the first motion vector and the differential motion vector from the received encoded signal; determining means for determining a decoded third motion vector extending from the third picture to be predicted to a pixel of the second reference picture closest to a point in the second reference picture where the extracted first motion vector intersects the second reference picture; and determining means for determining a decoded second motion vector by adding the extracted differential motion vector and the decoded third motion vector.
Claim 23
Dependent Claim
239 words
A video recording/reproducing apparatus comprising: an information reproducing unit for reproducing encoded data recorded on a digital recording medium, said encoded data including a first motion vector from a third picture to a first reference picture and a differential motion vector, said differential motion vector having been produced during encoding by determining a second motion vector from the third picture to a second reference picture, determining a third motion vector from a point of intersection of the first motion vector and the second motion and the second motion vector to a point where said first motion vector intersects the second reference picture, and subtracting the third motion vector from the second motion vector to derive said differential motion vector; and a decoder for decoding the encoded information reproduced by said information reproducing unit, said decoding apparatus comprising: receiving means for receiving the encoded signal including the first motion vector and the differential motion vector; means for extracting the first motion vector and the differential motion vector from the received encoded signal; determining means for determining a decoded third motion vector extending from the third picture to be predicted to a pixel of the second reference picture closest to a point in the second reference picture where the extracted first motion vector intersects the second reference picture; and determining means for determining a decoded second motion vector by adding the extracted differential motion vector and the decoded third motion vector.
Claim 24
Dependent Claim
46 words
The video recording/reproducing apparatus according to claim 19, wherein said information reproducing apparatus is constituted by an optical disk unit for optically reproducing said first vector data, said differential vector data and said difference data written on an optical disk serving as said digital recording medium.
Claim 25
Dependent Claim
69 words
The video recording/reproducing apparatus according to claim 19, wherein said information reproducing unit is constituted by a laser beam generator for generating a read laser beam, optical means for converging said read laser beam on an optical disk serving as said digital recording medium, thereby reproducing the encoded data from the optical disk, and a photosensor for converting a reflection beam from said optical disk to a coded signal.
Claim 26
Dependent Claim
20 words
The video recording/reproducing apparatus according to claim 19, wherein said differential motion vector is encoded to a variable length code.
Claim 27
Dependent Claim
37 words
The video recording/reproducing apparatus according to claim 19, wherein said differential motion vector is limited within a range of values obtained only when the directions of the first and second motion vectors are close to each other.
Claim 28
Dependent Claim
20 words
The video recording/reproducing apparatus according to claim 23, wherein said differential motion vector is encoded to a variable length code.
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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) | 2000-07-07 | 2001-01-06 | 2001-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-07-07 | 2005-01-06 | 2005-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-07-07 | 2009-01-06 | 2009-07-08 | $7700.00 | Window Closed / Lapsed |