System and method for improving video recorder performance in a search mode

• US 6,339,671 B1
• Filed: 05/23/2000
• Issued: 01/15/2002
• Est. Priority Date: 04/18/1991
• Status: Expired due to Term

• Current Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Original Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Inventors: De With, Peter H. N., Nijssen, Stephanus J. J.
• Primary Examiner(s): NGUYEN, HUY THANH
• Application Number:
  US09/575,974
• Time in Patent Office: 602 Days
• Field of Search: H04/N.5783, H04/N.592, 386/46, 386/68, 386/80, 386/81, 386/112, 386/124, 386/109, 348/420.1
• US Class Current: 386/326
• CPC Class Codes: G11B 15/1875 adaptations for special effects or editing signal processing or indexing therefor G11B27/00
• CPC Class Codes: G11B 20/1204 for continuous data, e.g. digitised analog information signals, pulse code modulated [PCM] data
• CPC Class Codes: G11B 20/1208 for continuous data, e.g. digitised analog information signals, pulse code modulated [PCM] data
• CPC Class Codes: G11B 2220/90 Tape-like record carriers
• CPC Class Codes: G11B 27/005 Reproducing at a different information rate from the information rate of recording for television signals H04N5/783
• CPC Class Codes: H04N 5/78263 for recording on tracks inclined relative to the direction of movement of the tape
• CPC Class Codes: H04N 5/78266 using more than one track for the recording of one television field or frame, i.e. segmented recording
• CPC Class Codes: H04N 5/783 Adaptations for reproducing at a rate different from the recording rate
• CPC Class Codes: H04N 5/937 by assembling picture element blocks in an intermediate store
• CPC Class Codes: H04N 9/8047 using transform coding

Abstract

A method and apparatus wherein video images are recorded on a plurality of tracks of a tape such that, for playback in a search mode at a speed higher than the recording speed the displayed image will consist of a plurality of contiguous parts, some of the parts being read out from tracks each having a different frame recorded thereon.

Claims

1. A method for shuffling digital data defining, on display, a plurality of images so as to enable recording said shuffled data on substantially parallel oblique tracks of a longitudinal record carrier, said method comprising the steps:

(a) generating blocks of coded data, each block including a plurality of pixels defining, on display, a rectangular area of one of said plurality of images;

(b) combining a plurality of blocks to form basic segments, each of said basic segments defining, on display, an incremental area of said one of said plurality of images;

(c) shuffling sequences of said basic segments so as to obtain a shuffled sequence of said basic segments, each shuffled sequence comprising a plurality of sub-sequences of basic segments, each sub-sequence defining, on display, a first contiguous part of said one of said plurality of images consisting of a plurality of said incremental areas lined up along a first axis, the sub-sequences of the sequence together defining, on display, a second contiguous part composed of first contiguous parts of said one of said plurality of images lined up along a second axis orthogonal to the first axis; and

(d) outputting said shuffled sequence.

2. The method as claimed in claim 1, wherein each of said basic segments defines, on display, an area having a longer length along said second axis than along said first axis perpendicular to said second axis, and wherein said sub-sequences extend along said first axis.

3. The method as claimed in claim 1, wherein said second axis is in a horizontal direction and said first axis is in a vertical direction, and wherein said sub-sequences comprise columns of basic segments having data defining, on display, vertically adjacent image elements.

4. A method for deshuffling shuffled display signals for display of an image in response to digital data received, the digital data comprising a shuffled sequence of a plurality of basic segments, each basic segment consisting of blocks of coded data including a plurality of pixels defining, on display, a rectangular area of said image, said basic segments defining on display an incremental area of said image, said shuffled sequence comprising a plurality of sub-sequences of a plurality of basic segments, each sub-sequence defining, on display, a first contiguous area of said image, the first contiguous areas being lined up along a first axis, the sub-sequences of the sequence together defining, on display, a second contiguous part composed of first contiguous parts lined up along a second axis orthogonal to said first axis, said method comprising the steps:

receiving portions of data of the shuffled display signals;

deshuffling the shuffled sequence of the plurality of basic segments into a deshuffled sequence so as to enable creating display signals; and

outputting said deshuffled sequence.

5. The method as claimed in claim 4, wherein said deshuffling and outputting steps comprise:

storing said portions of data in a read-out memory until sub-sequences defining, on display, a whole image have been stored; and

reading out image-defining data from said read-out memory in a sequence and at a rate suitable for display, thereby creating said display signals.

6. The method as claimed in claim 4, wherein the method further comprises the step:

decoding said deshuffled sequence before creating said display signals.

7. An apparatus for shuffling digital data defining, on display, a plurality of images so as to enable recording said shuffled data on substantially parallel oblique tracks of a longitudinal record carrier, said apparatus comprising:

(a) means for generating blocks of coded data, each block including a plurality of pixels defining, on display, a rectangular area of one of said plurality of images;

(b) means for combining a plurality of blocks to form basic segments, each of said basic segments defining, on display, an incremental area of said one of said plurality of images; and

(c) means for shuffling sequences of said basic segments so as to obtain a shuffled sequence of said basic segments, each shuffled sequence being a plurality of sub-sequences of basic segments, each sub-sequence defining, on display, a first contiguous part of said one of said plurality of images consisting of a plurality of said incremental areas lined up along a first axis, all of the sub-sequences on a track together defining, on display, a second contiguous part composed of first contiguous parts of said one of said plurality of images lined up along a second axis orthogonal to the first axis; and

(d) means for outputting said shuffled sequence.

8. An apparatus for deshuffling shuffled display signals for display of an image in response to digital data received, the digital data comprising a shuffled sequence of a plurality of basic segments, each basic segment consisting of blocks of coded data including a plurality of pixels defining, on display, a rectangular area of said image, said basic segments defining on display an incremental area of said image, said shuffled sequence comprising a plurality of sub-sequences of a plurality of basic segments, each sub-sequence defining, on display, a first contiguous area of said image, the first contiguous areas being lined up along a first axis, the sub-sequences of the sequence together defining, on display, a second contiguous part composed of first contiguous parts lined up along a second axis orthogonal to said first axis, the apparatus comprising:

means for receiving portions of data of the shuffled display signals;

means for deshuffling the shuffled sequence of the plurality of basic segments into a deshuffled sequence so as to enable creating display signals; and

means for outputting said deshuffled sequence.

9. The apparatus as claimed in claim 8, wherein said deshuffling and outputting means comprise:

means for storing said portions of data in a read-out memory until sub-sequences defining, on display, a whole image have been stored; and

means for reading out image-defining data from said readout memory in a sequence and at a rate suitable for display, thereby creating said display signals.

10. Apparatus as claimed in claim 8, wherein said apparatus further comprises:

means for decoding said deshuffled sequence before creating said display signals.

11. The apparatus as claimed in claim 8, wherein said apparatus further comprises:

display means for displaying said display signals.