Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
1998-06-08
2001-08-21
Garber, Wendy R. (Department: 2615)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000, C386S349000
Reexamination Certificate
active
06278837
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a recording and reproducing apparatus for recording and reproducing video data.
2. Description of the Prior Art
A multichannel recording and reproducing apparatus for recording multichannel video data on a VTR through multiplexing data and reproducing video data is known. Such a prior art video surveillance system is disclosed in U.S. Pat. No. 4,943,854.
SUMMARY OF THE INVENTION
The aim of the present invention is to provide an improved multichannel recording and reproducing apparatus.
According to the present invention, a multichannel recording and reproducing apparatus is provided, which includes: an inputting and outputting circuit including N video channel circuits for inputting and outputting N video data, N being a natural number; N data buffers for temporally storing the N video data from the N video channel circuits respectively; a disc unit for receiving one channel of the N video data and storing the N video data; a memory interface; a user interface for receiving request channel data indicative of the use of one of the N video channel circuits, a recording command and a reproducing command, and a corresponding file name from a user; a control circuit for operating one of the N video channel circuits in accordance with the request channel data and outputting the recording command, a reproducing command, the corresponding file name, and the request channel data from the user interface means; a filing circuit including a table for determining first address data corresponding to the file name from the control circuit in response to the recording command from the control circuit and storing a relation between the file name from the control means and the first address in the table to form a file and for determining second address data of the disc unit using the file name from the control circuit and the stored relation in response to the reproducing command data; and an access control circuit for accumulating the recording command and reproducing command, detecting an operation condition of the memory interface, and successively supplying each of the accumulated recording command and reproducing command when the interface means is in a non-operating condition with priority provided to either of the recording command or reproducing command in accordance with priority data, wherein the memory interface stores one of the N video data from the data buffer in the disc unit in response to the recording command, the first address data from the access control circuit, and the request channel data from the control circuit and reads and stores video data from the disc unit in one of the N data buffers in response to the reading command from the access control circuit, the second address data from the access control circuit, and the request channel data from the control circuit to output the video data from the disc unit through the inputting and outputting circuit.
In the multichannel recording and reproducing apparatus, the filing circuit may form the file indicating fragments of the memory, each fragment including successive segments, each segment storing one frame of the video data and has a table storing the first address of each of the fragments and each of the segments and a relation of between the file name and the fragments and a link relation of the fragments.
In this case, the user interface may further receive an endless recording command and a successively recording command and the filing circuit determines the first address in response to the endless recording command such that the video data recurrently is overwritten at a predetermined number of the fragments and the filling circuit determines the first address such that the video data successively recorded in response to the successively recording command.
The multichannel recording and reproducing apparatus may further include a synchronizing signal generation circuit for generating and supplying a plurality of vertical synchronizing signals of which phases are different each other, wherein the N video channel circuits are responsive to a plurality of vertical synchronizing signals respectively.
In the multichannel recording and reproducing apparatus, the user interface may include a plurality of terminals and the control circuit assigns one of the N video channel circuits to one of a plurality of the terminals in response to the request channel data so that one of the N video channel circuits is independently controlled by the each of a plurality of the terminals.
In the multichannel recording and reproducing apparatus, the inputting and outputting circuit may include a digital satellite broadcast data receiving circuit for receiving a digital satellite broadcasted data including multiplexed plurality of channels of video data and a separation circuit for separating the digital satellite broadcasted data into a plurality of channels of video data and storing the plurality of the channels of video data in the data buffer at different storing areas.
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Satoh Masaki
Tanaka Noriko
Uesugi Akio
Yasukohchi Ryuji
Chieu Po-lin
Garber Wendy R.
Lowe Hauptman & Gilman & Berner LLP
Matsushita Electric - Industrial Co., Ltd.
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