Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
1998-02-26
2001-12-25
Tran, Thai (Department: 2615)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000, C360S072100
Reexamination Certificate
active
06334022
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a video information recording and reproducing apparatus for recording and reproducing chiefly video information.
In recent years, disk drives respectively using optical disk and magnetic disks have been developed to have a larger capacity of storage and operate at higher speed, and image compression technology has also been remarkably advanced. A magnetooptical disk drive using a 130 mm diameter disk of which the one-side storage capacity is 1 GB or more, and a magnetic disk drive using 90-mm diameter disks of several GBs per disk, are practically used. In addition, a first-generation rewritable digital video disk (hereinafter, abbreviated DVD-RAM) will be produced in the near future, which is able to record information of 2.6 GB on one side of a phase change optical disk with a diameter of 120 mm. These optical-disk and magnetic-disk drives are capable of transferring data at a high rate of several tens of Mbps.
As to the image compression technology, MPEG (Moving Picture Experts Group) is established as an international standard for moving picture compression. In MPEG 1 substantially equivalent to the picture quality of VHS of VTR, the data transfer rate is 1.5 Mbps, and a capacity of about 600 MB will be needed to store moving pictures of 60 minutes. In MPEG 2, a data transfer rate of about 4 to 6 Mbps is necessary to achieve the picture quality of the present TV received picture quality or above, and the capacity for moving pictures of 60 minutes is about 1.8 to 2.7 GB. Thus, with the development of the above disk drives using optical and magnetic disks and the advancement of the image compression technology, it has become possible for the moving picture information which needs a high capacity of storage and a high rate of data transfer to be treated by the disk drives. Consequently, the industry is now seriously considering the application of these disk drives not only to a large-scale video server but also to a home video recording and reproducing apparatus.
There is now a video tape recorder (hereinafter, abbreviated VTR) as the home video recording and reproducing apparatus, which is now very popular. The conventional apparatus has a function of recording and reproducing one-channel video, and a search function such as programmed recording function. Since VTR uses a tape, or a sequential memory as a recording medium, it can record one program or reproduce one recorded program at the same time. The programmed recording function is to record a desired program by previously inputting the channel number, start time and end time into the VTR from a remote controller which the user handles. The VISS as the present search function of the VTR is to find the beginning of a recorded program on the basis of an index signal recorded on the tape at the time of starting to record.
Japanese Patent Laid-open Gazette 5-303873 describes that an arbitrarily recorded image portion can be reproduced in real time from a plurality of random-accessible image recorded portions without interrupting the recording.
However, use of only the above function to find the beginning cannot realize true free time-shift viewing.
In the gazette, when the user tries to view a recorded program at an arbitrary time under the condition that a certain program is being recorded on the VTR (for example, programmed recording),it is necessary to stop the recording operation or wait until it ends. In other words, the present VTR cannot realize free time-shift viewing in which the user can view a desired program at an arbitrary time.
In addition, the programmed recording operation in the gazette requires the user to input channel number, starting time, and end time into the VTR as describe above, and is thus very troublesome. Recently, a simplified programmed recording function such as G code is used, but it is not basically improved in its operation. Thus, the programmed recording function of the VTR cannot be widely used.
Moreover, since the VISS as the search function of the VTR is to only find the beginning as described above, the user cannot instantly know the contents of the recording on the tape, and thus must search the programs by finding the beginning of each program. Therefore, since it takes a much longer time to search a plurality of tapes, this search function is not practical.
SUMMARY OF THE INVENTION
It is an object of the invention to provide a video information recording and reproducing apparatus on which the user can view a desired recorded program at any time, readily search for a desired program, and automatically store a desired program.
According to the invention, in order to achieve the above object, there is provided a video information recording and reproducing apparatus having an inputting information part formed of interfaces for receiving chiefly video information, a storing information part, an outputting information part formed of interfaces for producing chiefly video information, and a controlling part for controlling the apparatus, so that the controlling part can order to cause a plurality of video information from the inputting information part to be stored in the storing information part in a time-sharing manner, or arbitrarily ones of a plurality of video information stored in the storing information part to be produced from the outputting information part in real time, or one or more video information from the inputting information part to be stored in the storing information part and at the same time arbitrary ones of the video information stored in the storing information part to be produced from the outputting information part in real time.
In addition, according to the invention, an automatic indexing information part for automatically adding indexes to the inputted video information is provided in the above video information recording and reproducing apparatus.
Moreover, according to the invention, a filtering video information part for automatically selecting video information to be stored from the inputting information part is provided in the above video information recording and reproducing apparatus.
By using the video information recording and reproducing apparatus of the invention, which is capable of recording and reproducing a plurality of video information in and from the storing information part in a time-sharing manner, automatically adding indexes to the video information by the automatic indexing information part, and automatically selecting video information by the filtering video information part, it is possible to provide a video filing apparatus having a free time-shift viewing function, an intelligent search function by simple operation, and an automatic video data base generation function to automatically store video information.
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Kageyama Masahiro
Kinoshita Taizo
Kumagai Yukio
Matsushita Toru
Ohba Akihiko
Hitachi , Ltd.
Onuaku Christopher
Tran Thai
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