Title:
【発明の名称】映像データの記録再生方法とその装置
Document Type and Number:
Japanese Patent JP3340639
Kind Code:
B2
Abstract:
A method and an apparatus for recording and playing back monitored video data for recording monitored video data generated continuously for a long time on a magnetic tape, with less S/N degradation by shortening the operation time of the VTR to suppress the degradation of the magnetic tape, recording head, and other mechanical items, wherein video signals from a video camera are converted to digital signals in an A/D converter, compressed and encoded in a compression encoder & decoder circuit, then transferred to a time axis compression circuit including the first memory, the second memory, an SCSI controller, and a hard disk unit, thereafter compressed on the time axis and recorded on the magnetic tape loaded in a D-VHS standard VTR via an I/F circuit. Compressing the video data from the compression encoder & decoder circuit on the time axis in the time axis compression circuit makes shorter the recording time of the video data on the magnetic tape than the actual recording time of the video camera, whereby the VTR is only required to record video data intermittently on the magnetic tape and that a general home VTR can be adopted as the above VTR, moreover the magnetic tape itself is prevented from damages.
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Inventors:
Kouichi Ono
Takayuki Kanesaki
Hideo Nishijima
Takayuki Kanesaki
Hideo Nishijima
Application Number:
JP1519097A
Publication Date:
November 05, 2002
Filing Date:
January 29, 1997
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
G11B20/10; H04N5/76; H04N5/915; H04N7/50; H04N5/781; H04N9/804; (IPC1-7): H04N5/915; G11B20/10
Domestic Patent References:
| JP87477A | ||||
| JP8336120A | ||||
| JP678269A | ||||
| JP388486A | ||||
| JP9326998A | ||||
| JP10285543A | ||||
| JP9224215A | ||||
| JP11284987A |
Other References:
【文献】国際公開96/33579(WO,A1)
Attorney, Agent or Firm:
Katsuo Ogawa (2 outside)