Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
1997-08-28
2001-05-29
Garber, Wendy R. (Department: 2615)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C348S554000, C348S555000, C348S441000
Reexamination Certificate
active
06240245
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a recording/reproducing device for recording/reproducing television signals (as will be called the “TV signals”) or the like and, more particularly, to a recording/reproducing device which is able to convert TV signals and second signals mutually by combining a converting function using digital signal processing.
There is a converter unit capable of converting signals of different formats/resolutions of personal computers, workstations or VTRs.
FIG. 12
is a block diagram showing a recording/reproducing device having a conventional converter unit connected therewith.
In FIG.
12
: reference numeral
1
designates a conventional VTR; numeral
2
a video cassette tape for recording video signals; numeral
10
a device such as a computer having RGB outputs; numeral
11
a distributor for outputting RGB signals, as inputted from the device
10
, to a plurality of units including a converter and a change-over unit; numeral
12
a down-convert unit for converting inputted RGB signals into video signals and outputting the video signals or for outputting inputted video signals as they are; numeral
13
a video input terminal in the VTR for inputting video signals from another device; numeral
14
an antenna for receiving TV waves; numeral
15
and antenna input terminal for inputting signals from the antenna
14
; numeral
3
a tuner for converting signals, as inputted from the antenna input terminal
15
, into video signals; numeral
4
a change-over switch for selecting one of the video signals coming from the video input terminal
13
and the tuner
3
, to send it to a downstream block; numeral
5
a recording block for recording video signals; numeral
6
a magnetic recording/reproducing block acting as a deck portion and a circuit for recording signals, as converted by the recording block
5
, on the video tape
2
; numeral
7
a reproducing block for converting the signals on the video tape
2
, as fetched by the magnetic recording/reproducing block
6
, into video signals; numeral
8
a control block for controlling the system entirety of the VTR
1
by a switch or a remote control; numeral
16
an antenna output terminal for outputting RF signals, as outputted from the reproducing block, to the outside of the VTR
1
; numeral
17
a video output terminal for outputting video signals, as outputted from the reproducing block
11
, to the outside of the VTR
1
; numeral
18
an up-convert unit for converting inputted video signals into RGB signals to output them or for outputting the inputted video signals as they are; numeral
19
a switcher for selecting one of a plurality of RGB input signals, as inputted from the distributor
11
or the up-convert unit
18
, to output it; numeral
20
a display monitor for displaying inputted RGB signals as an image; and numeral
21
a device such as a TV set for displaying inputted video signals as an image.
When the VTR
1
is put into an ordinary use in the system construction described above, the down-convert unit
12
makes a selection to output the inputted video signals as they are. When the signals of the personal computer
10
or the like are to be displayed on the display monitor
20
or the like, the switcher
19
makes a selection to output the input signals from the distributor
11
.
When the reproduced signals of the antenna input terminal
15
, the video input terminal
13
and the video tape
2
are to be displayed on the display monitor
20
or the like for displaying the RGB signals as an image, on the other hand, the switcher
19
makes a selection to output the input signal from the up-convert unit
18
. When the RGB signals, as outputted from the personal computer
10
or the like, are to be displayed on the TV set
21
or the like, on the other hand, the down-convert unit
12
makes a selection to convert the RGB signals into the video signals and to output them.
Here, the recording/reproducing device having the aforementioned converter unit connected therewith can be used in the following device.
FIG. 13
is a diagram showing a construction to be used in the video CD player, VD player, LD player or DVD player of the prior art.
In FIG.
13
: reference numeral
31
designates a reproducing disk; numeral
32
a disk player such as a DVD player for reproducing the reproducing disk
31
; numeral
33
a video output terminal; and numeral
34
a home TV set connected with the video output terminal. Moreover, the disk player
32
is composed of a reproducing block
35
for reproductively processing the signals recorded in the reproducing disk
31
, and a video conversion processing circuit
36
for converting the reproduced signals into video signals.
In the construction described above, the signals, as obtained from the reproducing disk
31
, are processed by the reproducing block and the video conversion so that they are outputted as the video signals from the video output terminal
33
thereby to display the recorded image in the home TV set
34
or the like.
In recent years, on the other hand, there have been used an increasing number of disk reproducing device which has a portion of the function of a disk ROM connected with a computer for the data transfer.
FIG. 14
is a diagram showing a construction to be used in a personal computer video CD player of the prior art.
In FIG.
14
: reference numeral
41
designates a reproducing disk; numeral
42
a disk unit; numeral
43
a reproducing block for reproducing signals recorded in the reproducing disk
41
; numeral
44
a data bus interface (I/F) for connecting the disk unit
42
with the personal computer; numeral
45
the personal computer; numeral
46
a data bus interface (I/F) for connecting the personal computer
45
with the disk unit
42
; numeral
47
a CPU; numeral
48
a data bus for connecting the CPU
47
and each circuit; numeral
49
a PC data conversion processing circuit for converting input signals to be inputted to the personal computer
45
, into digital data signals for the personal computer; numeral
50
a video conversion processing unit for converting data into video signals; numeral
51
a D/A converter for converting digital video signals into analog video signals; numeral
52
a video output terminal for outputting video signals; and numeral
53
a display monitor connected with the video output terminal
52
.
In this construction, the signals, as obtained from the reproducing disk
41
, are processed by the producing block, and the digital data for the data bus are then converted and inputted to the inside of the personal computer
45
through the data bus I/F
44
and
46
. The inputted video signals are converted by the PC data conversion processing circuit
49
into data bus digital data, which are inputted to another video conversion processing unit
50
via the data bus
48
connected with the CPU
47
, so that they are converted into video signals. The video signals thus converted are subjected to a D/A conversion by the D/A converter
51
so that they are outputted as the RGB (i.e., analog video signals in red, green and blue colors) outputs from the RGB output terminal
52
thereby to display the image or the like, as recorded in the reproducing disk
41
, in the computer display monitor
53
.
In this recording/reproducing device of the prior art, however, the recording/reproduction of the second signals (i.e., signals of a system other than the TV signal system) in the VTR (i.e., the recording/reproducing device), as shown in
FIG. 12
, could be realized by connecting the up-convert unit
18
(i.e., a converter U)
18
for converting the TV signals into the second signals and the down-convert unit (i.e., a converter D) for converting the second signals into the TV signals. However, the switching operations at the input selecting time are complicated, as described above. Another problem is that two sets of convert units having similar constructions have to be incorporated.
In the disk devices shown in
FIGS. 13 and 14
, on the other hand, in accordance with the large capacity of
Aoki Shigehisa
Kato Naoki
Boccio Vincent F.
Garber Wendy R.
Mitsubishi Denki & Kabushiki Kaisha
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