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Digital video signal reproducing apparatus with high-speed play mode

a high-speed play and video signal technology, applied in the field of digital video signal reproducing apparatus, can solve problems such as unnatural images and difficulties in viewing

Inactive Publication Date: 2002-07-30
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Therefore, it is an object of the present invention to provide digital video signal reproducing apparatus which reproduces at a high speed digital video signals that had previously been recorded on a magnetic tape, resulting in a video display which appears as a natural image.

Problems solved by technology

Hence, the resultant image which is reproduced from the data recovered from portions of respective tracks appears as a synthesized display which is perceived as an unnatural image which may be difficult to view.

Method used

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  • Digital video signal reproducing apparatus with high-speed play mode
  • Digital video signal reproducing apparatus with high-speed play mode
  • Digital video signal reproducing apparatus with high-speed play mode

Examples

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Embodiment Construction

Referring now to the drawings, FIG. 1 is a block diagram of apparatus including a recording section for recording digital video signals on a magnetic tape 12 and a reproducing section for reproducing those digital video signals at relatively high playback speeds. The recording section includes an analog-to-digital converter 2 for receiving the video signal supplied thereto from an input terminal 1 and digitizing those video signals. As will be described, the recording section is adapted to record either NTSC or PAL video signals.

The digitized video signals, which constitute a frame of video samples, or picture elements (pixels), are assembled into blocks of data units, each unit being comprised of an 8.times.8 array of video samples, by a blocking circuit 3. The blocking circuit also is adapted to shuffle the data blocks, as will be described, and to subject the shuffled blocks to luminance / chrominance (Y / C) multiplexing, as is known to those of ordinary skill in the art. In particu...

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Abstract

Apparatus for reproducing digital video signals from a magnetic tape, wherein a frame of digital video signals had been recorded in 2 m tracks (m is an integer greater than 1), in which a pair of rotary heads having respectively different azimuth angles scan traces across the magnetic tape, such traces substantially coinciding with the tracks when the magnetic tape is transported at a speed equal to the recording speed. The magnetic tape is transported at a high speed equal to (mxn±1) times the recording speed, where n is an integer greater than 0,1=0.5 when the pair of heads are arranged as a double azimuth head assembly and 1=0.25 when the heads are angularly separated by 180°.

Description

BACKGROUND OF THE INVENTIONThis invention relates to digital video signal reproducing apparatus and, more particularly, to such apparatus which is capable of reproducing digital video signals at a high speed, thereby providing a high speed play mode, from which a natural looking image may be displayed.Both analog and digital video recorders are known to record a frame of video signals in a plurality of slant tracks on a magnetic tape. For example, in an analog 8 mm video recorder, one video frame is recorded in two tracks. In a digital video recorder of the type known as the D-2 format, one frame of digital video signals is recorded in 12 slant tracks. Still further, a digital video recorder for consumer use has been proposed, wherein one frame of an NTSC video signal is digitized and recorded in 10 tracks and one frame of a PAL video signal is digitized and recorded in 12 tracks.In analog and digital video playback devices, such as a video recorder exhibiting a reproducing mode, th...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H04N7/52H04N9/804H04N5/783H04N5/7824H04N5/7826G11B15/467G11B5/008G11B5/53G11B15/12G11B15/18H04N5/782H04N5/919H04N5/92H04N9/888H04N9/896H04N21/236H04N21/432H04N21/434
CPCG11B5/00878G11B5/53G11B15/125G11B15/1875G11B15/467H04N5/78263H04N5/78266H04N5/783H04N5/919H04N9/8047H04N9/888H04N9/896H04N21/236H04N21/4325H04N21/434H04N19/85G11B5/02
Inventor OIKAWA, YUKA
Owner SONY CORP
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