Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
1997-04-30
2002-12-24
Tran, Thai (Department: 2615)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000
Reexamination Certificate
active
06498893
ABSTRACT:
BACKGROUND OF THE INVENTION
Field of the Invention
This invention relates to a recording/reproducing apparatus for recording and reproducing video signals and speech signals on or from an optical disc or a magnetic disc as a overwrite type disc-shaped recording medium.
Recently, in a recording/reproducing apparatus for recording and reproducing video signals and speech signals on or from an optical disc or a magnetic disc as a overwrite type disc-shaped recording medium, a technique of perpetually recording live broadcast of, for example, a television program at all times in order to retrogressively view a sole scene which has been overlooked and which it is desired to re-view by the viewer.
Such a recording/reproducing apparatus includes, as shown in
FIG. 1
, an analog/digital (A/D) converter
311
for digitizing picture signals entering an input terminal I
3a
, and a synchronization separating circuit
310
for extracting vertical synchronization signal of the picture signal entering the input terminal I
3a
. The recording/reproducing apparatus also includes a compression circuit
312
for encoding picture data from an A/D converter
311
in synchronism with vertical synchronization signal from the synchronization separating circuit
310
and a first-in first-out buffer (FIFO)
313
for storing the picture data from the A/D converter
311
. The FIFO buffer is referred to herein as a buffer for video recording. The recording/reproducing apparatus also includes an A/D converter
331
for digitizing speech signals entering an input terminal I
3c
and a compression circuit
332
for encoding speech data from the A/D converter
331
in synchronism with a vertical synchronization signal from the synchronization separating circuit
310
. The recording/reproducing apparatus also includes a FIFO buffer
333
for storing speech data from the compression circuit
332
. The FIFO buffer
333
is referred to herein as a buffer for speech recording. The recording/reproducing apparatus further includes a disc drive
303
for recording video data from speech data from the FIFO
313
for storing the picture data and the speech data from the FIFO buffer
333
for storing speech data on a overwrite type disc
302
in accordance with a pre-set format and for reproducing the speech data and the video data recorded on the disc
302
.
The input terminals I
3a
and I
3c
are connected to, for example, a tuner, not shown, configured for receiving live broadcast.
The recording/reproducing apparatus
300
also includes a FIFO buffer for storing speech data obtained by the disc drive
303
and an expansion circuit
342
for decoding the speech data from the FIFO buffer
343
in synchronism with the vertical synchronization signals from the synchronization separation signal
310
. The FIFO buffer
343
is referred to herein as a buffer for speech reproduction. The recording/reproducing apparatus
300
also includes digital analog (D/A) converter
341
for converting speech data from the expansion circuit
342
into analog data for outputting at an output terminal I
3d
, and a FIFO buffer
323
for storing video data obtained from the disc drive
303
. The FIFO buffer
323
is referred to herein as a buffer for video reproduction. The recording/reproducing apparatus
300
further includes an expansion circuit
322
for decoding video data from the expansion circuit
322
and a D/A converter
321
for converting the video data from the expansion circuit
322
into analog data for outputting at an output terminal I
3b
. The speech data stored in the FIFO buffer for speech reproduction
343
is also supplied to the disc drive
303
.
The output terminals I
3b
and I
3d
are connected to a monitor not shown, configured for displaying and outputting a picture derived from the video signals supplied thereto via output terminal I
3b
and for outputting the speech derived from the speech signals supplied thereto from a speaker, not shown, via output terminal I
3d
.
The recording/reproducing apparatus
300
also includes a system controller
301
for controlling an output of the buffer for video recording
313
to the disc drive
303
, an output of the buffer for speech recording
333
to the disc drive
303
, an output of the buffer for speech reproduction
343
to the disc drive
303
and an output of the disc drive
303
to the buffer for speech reproduction
343
and to the buffer for video reproduction
323
. The system controller
301
is configured for performing control processing based on a vertical synchronization signal from the synchronization separation circuit
310
, a full flag F
fu
from the buffer
313
for video recording, an empty flag F
em
from buffer
323
for video reproduction and a transfer permission flag
Fok
from the disc drive
303
.
There is provided on the output side of the D/A converter
321
a switch
320
to which are supplied video signals from the input terminal I
3a
and video signals from the D/A converter
321
. There is also provided on the output side of the D/A converter
341
a switch
340
to which are supplied speech signals from the input terminal I
3c
and speech signals from the D/A converter
341
. Under switching control by the system controller
301
, not shown, the switches
320
,
340
are changed over to the input terminal I
3a
and to the input terminal I
3c
during the recording operation, respectively, and to the D/A converters
321
,
341
during the playback operation, respectively.
There is also provided on the input side of the buffer for speech reproduction a switch
344
to which are supplied speech data from the compression circuit
332
and speech data derived from the disc drive
303
. Under switching control by the system controller
301
, not shown, the switch
344
is changed over to the side of the compression circuit
332
and to the side of the disc drive
303
during the recording operation and during the reproducing operation, respectively.
The above-described recording/reproducing apparatus uses a one-shoat playback system of temporarily interrupting the recording operation and a parallel recording/reproducing system of performing the payback operation while continuing the recording operation, in order to permit the user to regressively view the scene he or she has just viewed for a moment.
Referring to
FIG. 2
, if video signals and speech signals VA
0
, VA
1
, VA
2
, . . . from a tuner receiving the live broadcast, referred to herein as input signals, are supplied to the recording/reproducing apparatus
300
, and the playback mode by the one-shot playback system, referred to herein as one-shot playback mode, is set directly after the end of inputting of the input signal VA
5
by the key input by the user, the recording/reproducing apparatus
300
momentarily discontinues the recording operation at the same time as the one-shot playback mode is set. At this time, the input signals VA
0
to VA
5
have been recorded on the disc
302
. The recording/reproducing apparatus
300
then reproduces the previously recorded input signals VA
2
to VA
5
from the disc
302
. Subsequently, the recording/reproducing apparatus
300
starts the recording operation for the currently inputted input signals VA
10
, VA
11
, . . .
Thus, until the recording/reproducing apparatus
300
is set to the one-shot playback mode, a live picture corresponding to the input signals VA
0
to VA
5
from the tuner, not shown, for receiving the live broadcast, is displayed on the monitor, not shown. Once the recording/reproducing apparatus
300
is set to the one-shot playback mode, the playback picture corresponding to the input signals VA
2
to VA
5
is displayed on the monitor. The recording/reproducing apparatus
300
does not perform the recording operation for the input signals VA
6
to VA
9
entered during the period the playback picture is displayed on the monitor. After the end of display of the playback picture corresponding to the input signals VA
2
to VA
5
, a live picture corresponding to the currently inputted input signals VA
10
, VA
11
, . . . is displayed.
Suenaga Shinichi
Yoshimura Kosuke
Frommer William S.
Frommer & Lawrence & Haug LLP
Onuaku Christopher
Polito Bruno
Sony Corporation
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