Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
1998-10-01
2001-11-20
Nguyen, Huy (Department: 2615)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000, C386S349000
Reexamination Certificate
active
06321027
ABSTRACT:
FILED OF THE INVENTION
The present invention relates to a video signal recorder for recording video signals through coding the video signals by digital compression such as the MPEG (moving picture experts group) standard.
BACKGROUND OF THE INVENTION
Recorders employing tape, disc and other mediums have been proposed to record digitally encoded video signals.
These recorders typically require driving the recording media. These conventional recorders are thus unable to record information or data immediately after a recording instruction. In other words, several seconds are required before the driving becomes stable, when video signals are ready to be recorded. A delay for several seconds is thus inevitable from an instance when a user want to record video signals.
A method for reducing this delay has been proposed, namely, to keep driving the medium during a “pause” period. When a disc is employed as a recording medium, the disc is kept rotating during a pause period, and when a tape is employed, a cylinder is kept rotating during the pause period. In these cases, electric power is consumed although the recorder does not record anything. This can be a serious problem, for example, to a battery-driven camcorder.
SUMMARY OF THE INVENTION
A video signal recorder of the present invention comprises the following elements:
(a) coding means for encoding video signals,
(b) memory means for storing the coded data,
(c) record means for recording the coded data in a recording medium,
(d) drive means for driving the recording medium,
(e) control means for controlling all the above means or one of the above means.
The control means does not drive the drive means when a record instruction is not given. When a record instruction is given, substantially at the same time, the control means starts coding with the coding means. The control means also sequentially stores data coded in a coding circuit into a semiconductor memory. When the drive reaches to a predetermined rotational speed, the controller reads out the data stored in the memory, and then converts the data into record signals in a recording circuit. Finally, the controller records the signals in the record medium.
REFERENCES:
patent: 5134487 (1992-07-01), Taguchi et al.
patent: 5432769 (1995-07-01), Honjo
patent: 5523857 (1996-06-01), Fukushima
patent: 9-135458 (1997-05-01), None
Matsushita Electric - Industrial Co., Ltd.
Nguyen Huy
Ratner & Prestia
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