US 7,369,746 B2Granted

Device for recording digital video and audio signals in designated areas of a recording medium in a predetermined track format

AssigneeMitsubishi Denki Kabushiki Kaisha

InventorsTomohiro Ueda, Taketoshi Hibi, Junko Ishimoto, Masako Asamura, Nobuyoshi Okumura, Sadayuki Inoue, Tohru Inoue, Ken Onishi

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Abstract

Data separating means extracts intra-frame or intra-field encoded blocks from an intra-frame or intra-field encoded, and inter-frame or inter-field encoded digital video signal, and a digital audio signal contained in an input bit stream. Error correction code appending means appends error correction codes to the extracted intra-encoded blocks. Recording means records the data having the error correction code appended, in special replay data recording areas predefined on the magnetic recording tape. During fast replay or slow replay, error correction is achieved even for the replay signal with a low output level and a poor symbol rate.

Claims4

Dependent claims

An apparatus for recording digital video and audio signals in respective designated areas of a track in a predetermined track format, and replaying from the areas, comprising:

data separating means for extracting intra-encoded data in the form of intra-frame or intra-field encoded data from the intra-frame or intra-field encoded, or inter-frame or inter-field encoded digital video signal, and the digital audio signal contained in an input bit stream;
and
recording means for recording the extracted video signal and audio signal of the bit stream in the digital video signal areas, and recording intra-encoded data extracted by said data separating means in the digital audio signal areas, and in the digital video signal areas, where the same intra-frame data extracted for special playback is recorded a plurality of times in said track by being recorded in said digital video signal areas and the digital audio signal areas.

Dependencies are inferred from the claim text.

Facts

Application: 09/984,413Filed 30 Oct 2001 · division
Priority: JP 6/9936912 Apr 1994
Published: US 2002/0031338 A114 Mar 2002
Granted: 6 May 2008
Term ends: Not estimatedThe source records don’t support an estimate.

Classification21 codes

H04N 9/8042
Involving pulse code modulation of the colour picture signal components: involving data reduction
G11B 5/0086
On transverse tracks: using cyclically driven heads providing segmented tracks
G11B 5/09
Recording, reproducing, or erasing methods; Read, write or erase circuits therefor: digital recording
G11B 15/1816
Driving of both record carrier and head: programmed access in sequence to indexed parts of operating tapes cooperating with rotating heads

Family

Application08/420,141Parent of this division · filed 11 Apr 1995
Application08/902,313Parent of this division · filed 29 Jul 1997
US 5,684,915 AParent of this division · filed 4 Nov 1997
Application09/238,071Parent of this division · filed 17 Jan 1999
US 5,960,150 AParent of this division · filed 28 Sep 1999
Application09/573,642Parent of this division · filed 17 May 2000
US 6,085,022 AParent of this division · filed 4 Jul 2000
US 2002/0031338 A1Pre-grant publication · published 14 Mar 2002
US 6,339,670 B1Parent of this division
US 7,369,746 B2This patent

From the US filing history. Foreign family members aren’t listed.