Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
1998-07-01
2002-09-17
Chevalier, Robert (Department: 2615)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C386S349000
Reexamination Certificate
active
06453110
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention generally relates to an electronic equipment control system, an electronic equipment control method, a reproducing apparatus, an output apparatus, and a transmission medium. To be more particular, the present invention relates to an electronic equipment control system, an electronic equipment control method, a reproducing apparatus, an output apparatus, and a transmission medium that are capable of controlling equipment having an interactive user interface by a simple device.
The AV equipment control commands (AV/C commands) of IEEE (Institute of Electrical and Electronics Engineers) 1394 “High Performance Serial Bus Standard” (hereafter referred to as the 1394 digital interface as appropriate) are adapted to send a command to a target equipment unit to put the same into a desired state, enabling automatic control thereof.
For example, a control command PLAYBACK PAUSE puts a target equipment unit into a state in which playback is paused. On the contrary, an ordinary PAUSE command as used in an infrared remote commander only tells a target equipment unit that the PAUSE key of the remote commander has been pressed. Receiving the PAUSE command, the equipment unit executes a predetermined operation according to its state.
Sometimes, human operations must be transmitted directly to a target equipment unit without resorting to automatic control. For example, when moving a cursor displayed on a menu screen vertically or horizontally, positioning the cursor at a desired menu item displayed on the screen, and then operating a predetermined button to select that menu item, the cursor is moved vertically or horizontally, the position is determined, the selected menu item is recognized by the controller, and a command for putting the equipment into a required state is issued by the related art AV/C command system.
Therefore, the controller receives the signals from all equipment units connected through the digital interface and decodes the received signals to recognize the selection made on the menu screen.
FIG. 4
illustrates an example of the constitution of a related art AV system. As shown, a DVD (Digital Versatile Disc) drive
100
and an intelligent display device
200
are interconnected through the 1394 digital interface. As will be described later, the intelligent display device
200
sends a command in compliance with the SBP-2 (Serial Bus Protocol 2) specifications to the DVD drive
100
and the DVD drive
100
sends DVD data such as video data, audio data, sub-picture data, or system data to the intelligent display device
200
.
FIG. 5
is a block diagram illustrating an example of constitutions of the intelligent display device
200
and the DVD drive
100
. A remote commander signal receiver
31
constituting the intelligent display device
200
receives a remote commander signal coming from the remote commander
300
on infrared radiation for example and supplies a command specified by the received signal to a CPU (Central Processing Unit)
28
to be described later. According to the command supplied from the remote commander signal receiver
31
, the CPU
28
executes specified control on the intelligent display device
200
.
An interface
21
extracts video data, sub-picture data, and audio data from a packet transmitted from the DVD drive
100
through the 1394 digital interface and supplies the video data to a video decoder
22
, the sub-picture data to a sub-picture decoder
23
, and the audio data to the audio data decoder
24
.
The packet also includes information about such as a menu. An I/F
21
supplies this information to a DRAM
25
. The CPU
28
reads the information about such as a menu from the DRAM
25
and supplies the information to an OSD (On Screen Display) generator
27
. The OSD generator
27
, based on the information supplied from the CPU
28
, generates a menu screen composed of predetermined character strings, graphics, icons, and so on and supplies the generated menu screen to an NTSC/PAL encoder
26
.
The video decoder
22
decodes the video data supplied from the I/F
21
and supplies the decoded data to an NTSC/PAL encoder. The sub-picture decoder
23
decodes the sub-picture data supplied from the I/F
21
and supplies the decoded data to the NTSC/PAL encoder
26
. The audio decoder
24
decodes the audio data supplied from the I/F
21
and supplies the decoded data to a D/A converter
30
. The D/A converter
30
converts the digital audio data supplied from the audio decoder
24
into an analog audio signal and outputs the same.
The NTSC/PAL encoder
26
merges the video data supplied from the video decoder
22
, the sub-picture data supplied from the sub-picture decoder
23
, and the data corresponding to the menu screen supplied from the OSD generator
27
, converts the merged data into a digital signal corresponding to an NTSC video signal, and supplies this signal to a D/A converter
29
. The D/A converter
29
converts the digital signal supplied from the NTSC/PAL encoder
26
into an analog signal and outputs the same.
On the other hand, a servo
7
constituting the DVD drive
100
controls a driver
8
by way of a CPU
6
, rotating a motor
9
. The CPU
6
controls the components of the DVD drive
100
. An optical pickup
2
radiates light such as a laser beam onto a disc
1
and receives the reflected light therefrom to read signals recorded on the disc
1
.
An amplifier
3
amplifies the signal read by the optical pickup
2
and supplies the amplified signal to a demodulator/error corrector
4
. The demodulator/error corrector
4
demodulates the signal supplied from the amplifier
3
, performs error correction on the demodulated signal, and supplies the resultant signal to an I/F
10
through a buffer
5
.
The I/F
10
forms the signal supplied through the buffer
5
into a packet compatible with the 1394 digital interface and transmits this packet to the intelligent display device
200
through the 1394 digital interface.
The following describes the operations of the above-mentioned devices. The servo
7
controls the driver
8
by way of the CPU
6
to drive the motor
9
. The motor
9
rotates the disc
1
. From the optical pickup
2
, a laser beam is radiated under the control of the CPU
6
onto the recording surface of the disc
1
. The laser beam reflected from the recording surface of the disc
1
is received by a photodetector constituting the optical pickup
2
to be converted into an electrical signal, which is supplied to the amplifier
3
.
The signal supplied to the amplifier
3
is amplified to be supplied to the demodulator/error corrector
4
. The amplified signal supplied to the demodulator/error corrector is demodulated and error-corrected to be supplied to the I/F
10
through the buffer
5
. The signal supplied to the I/F
10
is formed into a packet compatible with the 1394 digital interface to be transmitted to the intelligent display device
200
through the 1394 digital interface.
The packet supplied to the intelligent display device
200
is converted by the I/F
21
into the original digital data. The video data included in this signal is supplied to the video decoder
22
and the sub-picture data included in this signal is supplied to the sub-picture decoder
23
. The audio data included in this signal is supplied to the audio decoder
24
. The information about such as a menu included in this signal is supplied to the DRAM
25
to be stored therein.
The video data supplied to the video decoder
22
is decoded into the original video data, which is supplied to the NTSC/PAL encoder
26
. The sub-picture data supplied to the sub-picture decoder
23
is decoded into the original sub-picture data, which is supplied to the NTSC/PAL encoder
26
. The audio data supplied to the audio decoder
24
is decoded into the original audio data, which is supplied to the D/A converter
30
. The D/A converter
30
converts the audio data supplied from the audio decoder
24
into an analog audio signal, which is then outputted.
The information about such as a menu stored in
Inoue Hiraku
Kawamura Harumi
Sato Makoto
Yonemitsu Jun
Chevalier Robert
Frommer William S.
Frommer & Lawrence & Haug LLP
Sony Corporation
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