JP2003264798A - Processor and processing method for reproducing data stream, program for executing the method, computer readable medium with the program recorded thereon, and image display using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To display a pseudo pause image even when a recorder does not output a data stream including image data for a pause when the recorder is in a pause state, and to report to a user that the recorder is in the pause state. <P>SOLUTION: When the recorder 150 is in a reproduction state and the user instructs the pause to a controller 112, the controller 112 sends a pause command to the recorder 150 and makes the recorder 150 the pause state. Also, at that point, the controller 112 instructs the write stoppage of an output buffer to a video decoder 124. In this case, in the output buffer, overwrite is inhibited, the last video data VD in the reproduction state are held, and the video data VD are repeatedly read. Thus, on a display 125, a still image by the video data VD outputted from the video decoder 124 is displayed. Thus, the user recognizes that it is in the pause state. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an HDD (H
ard disk drive) and other MPEG playback
(Moving Picture Experts Group) A reproduction data stream processing apparatus and processing method suitable for application when processing a data stream such as a data stream, a program for executing the method, and a computer-readable program recording the program. The present invention relates to a medium and an image display device using the medium.

More specifically, the present invention decodes coded image data included in a data stream reproduced by a recording device and then outputs the decoded image data via an output buffer. A pause command is sent to the recording device. When the recorder is in the paused state, writing to the output buffer is stopped, and the image data stored in the output buffer is repeatedly read and output, so that the image data for the pause is displayed when the recorder is in the paused state. The present invention relates to a reproduction data stream processing device or the like that displays a pause image in a pseudo manner to notify the user that the recording device is in the pause state even when the data stream containing the data is not output.

[0003]

2. Description of the Related Art Conventionally, for example, as a digital broadcast receiver, a received data stream such as an MPEG data stream is recorded in a recording device such as an HDD, and then the data stream recorded in this recording device is reproduced. A device capable of displaying an image is known. In this case, the recording device is installed in the main body of the receiver such as IEEE1394.
(I.LINK) or other digital interface. Here, "i.LINK" is a registered trademark.

FIG. 7 shows the configuration of the image data processing system 300 of the receiver body. This image data processing system 30
0 is a video decoder 301 for decoding the coded image data Va extracted from the data stream reproduced by a recording device (not shown), and the video decoder 3
A display 302 for displaying an image based on the image data Vb obtained by decoding at 01, and a signal path connection between the video decoder 301 and the display 302,
And an output gate circuit 303 for controlling non-connection. The display 302 is, for example, a CRT (cathode-ray).
tube) display, LCD (liquid crystal displa
y), an image display device such as a PDP (plasma display). Video decoder 301 and output gate circuit 303
Is controlled by a system controller (not shown) for controlling the operation of the entire receiver.

The video decoder 301 is a buffer 301a for temporarily storing the input coded image data Va.
And a decoder unit 301b for reading the coded image data Va stored in the buffer 301a, performing a decoding process on the coded image data Va to obtain the image data Vb, and output from the decoder unit 301b. Output buffer 30 for temporarily storing the image data Vb to be reproduced
1c and a writing / reading control unit (W / R control unit) 301d for controlling the writing / reading operation of the output buffer 301c.

The operation of the image data processing system 300 shown in FIG. 7 will be described with reference to the sequence diagram of FIG. When the user instructs reproduction, the system controller sends a reproduction command to the recording device via the digital interface. Therefore, the data stream is supplied from the recording device to the receiver main body via the digital interface, and the encoded data Va extracted from the data stream is input to the video decoder 301. This encoded data Va is stored in the buffer 301a.

At this time, the system controller instructs the video decoder 301 to start decoding. for that reason,
The decoder unit 301b starts decoding the encoded image data Va stored in the buffer 301a. Then, the image data Vb obtained by being decoded by the decoder unit 301b is written into the output buffer 301c, and the image data Vb is output from the output buffer 301c.
Are sequentially read. This image data Vb becomes the output of the video decoder 301.

At this time, the system controller also instructs the output gate circuit 303 to open the output gate. Therefore, the signal path between the video decoder 301 and the display 302 is in the connected state. Therefore, the image data Vb output from the video decoder 301 is supplied to the display 302 via the output gate circuit 303. As a result, the reproduced image based on the image data Vb is displayed on the display 302.

Next, when a pause is instructed, the system controller sends a pause command to the recording device via the digital interface to put the recording device in a pause (playback pause) state. It should be noted that the recording device does not supply the data stream for displaying the pause image to the receiver main body when it is in the pause state, which is not described above. At this time, the system controller is the video decoder 301.
Instruct to stop decoding. Therefore, the video decoder 301 does not output the image data Vb.

At this time, the system controller also instructs the output gate circuit 303 to close the output gate. Therefore, the signal path between the video decoder 301 and the display 302 is disconnected. Therefore, the image data Vb is not supplied to the display 302, and no image is displayed on the display 302.

[0011]

In the image data processing system 300 described above, when the recording device is in the pause state, the image data Vb is not supplied to the display 302, and no image is displayed on the display 302. Is not displayed. Therefore, there is an inconvenience that the user cannot be notified that the recording device is in the pause state.

An object of the present invention is to enable a pseudo image of a pause to be displayed even if the recording device does not output a data stream including image data for the pause when the recording device is in a pause state, and the recording device is paused for the user. It is to provide a reproduction data stream processing device and the like capable of notifying that the state is in effect.

[0013]

A reproducing data stream processing apparatus according to the present invention sends a command via a digital interface to a recording device which records a data stream including at least encoded image data, and records this. An operation control means for controlling the operation of the equipment, and when the operation control means sends a reproduction command to the recording equipment to bring the recording equipment into the reproduction state, the operation device includes the data stream supplied from the recording equipment via the digital interface Decoding means for decoding the encoded image data, an output buffer for temporarily storing the image data output from the decoding means, and a write / read control means for controlling writing and reading of the output buffer Then, the operation control means sends a pause command to the recording device to record this. When vessel to a pause state, in which a control means for controlling the write and read control means to stop the writing of the output buffer.

Also, in the reproduction data stream processing method according to the present invention, a reproduction command is sent to a recording device which records a data stream including at least encoded image data via a digital interface to reproduce the recording device. When the state is set, the encoded image data included in the data stream supplied from this recording device via the digital interface is decoded, and the image data obtained by this decoding is written to the output buffer and output from this output buffer. When reading and outputting and sending a pause command to the recording device via the digital interface to put this recording device into the paused state, writing to the output buffer is stopped and the image data stored in this output buffer is repeatedly read. It is what is output.

A program according to the present invention is for causing a computer to execute the above-mentioned reproduction data stream processing method. A computer-readable medium according to the present invention has the above-mentioned program recorded therein.

Further, the image display apparatus according to the present invention sends a command via a digital interface to a recording device which records a data stream including at least encoded image data, and controls the operation of this recording device. An operation control means and an encoded image included in a data stream supplied from the recording device via a digital interface when a reproduction command is sent to the recording device by the operation control means to bring the recording device into a reproduction state. Decoding means for decoding data, an output buffer for temporarily storing image data output from the decoding means, write / read control means for controlling writing and reading of the output buffer, and operation control means When sending a pause command to a recording device to put this recording device into a paused state And control means for controlling the write and read control means to stop the writing of the output buffer, but provided with a display for displaying images according to image data output from the output buffer.

In the present invention, the recording device is connected via the digital interface. A data stream including at least encoded image data is recorded in this recording device.

The recording device can be put into a reproducing state by sending a reproducing command through the digital interface. At this time, the encoded image data included in the data stream supplied from the recording device via the digital interface is decoded by the decoding means. Then, the image data obtained by this decoding is temporarily written in the output buffer, and then read and output from this output buffer. This causes the display to display a reproduced image based on the image data.

In this reproducing state, by sending a pause command through the digital interface, the recording device can be put in the pause state. At this time, writing to the output buffer is prohibited. Therefore, the output buffer is in a state where overwriting is prohibited, and the last image data in the reproduction state is held as it is. In this state, the image data stored in this output buffer is repeatedly read and output. As a result, a still image based on the image data is displayed on the display, and the user can be informed that the recording device is in the paused state.

Further, in this paused state, by sending a pause cancel command through the digital interface, this recording device can be brought into the reproduction state again.
At this time, the encoded image data included in the data stream supplied from the recording device via the digital interface is decoded by the decoding means. Then, the writing of the output buffer is resumed, the image data obtained by the decoding is temporarily written in the output buffer,
After that, it is read from this output buffer and output. As a result, an image based on the image data is displayed on the display.

When the recording device is in the pause state,
The decoding operation in the decoding means may be stopped. As a result, it is possible to save power consumption without performing unnecessary processing.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of a digital broadcast receiver 100 as an embodiment. The receiver 100 is configured by connecting a receiver main body 110 and a recording device 150 with a cable 160. In the present embodiment, the receiver body 110 and the recording device 150 are connected by IEEE 1394 (i.LINK) which is one of digital interfaces. Therefore, one end of the cable 160 is connected to the recording device 150.
I. It is connected to the LINK port 151, and the other end is connected to the i. LINK port 111
It is connected to the.

The recording device 150 will be described. The recording device 150 is, for example, an HDD, but may be a device that records on a recording medium other than a hard disk. This recording device 150 has the same i. LINK port 151
In addition to the above, a recording unit 152 is provided. The recording unit 152 uses the i. It is connected to the cable 160 via the LINK port 151.

The configuration of the receiver body 110 will be described. The receiver main body 110 includes a microcomputer, and has a system controller 112 as a control unit for controlling the operation of the entire receiver and a remote control signal reception circuit 113 for receiving a remote control signal. The remote control signal receiving circuit 113 is connected to the system controller 112, receives a remote control signal RM output from the remote control transmitter 200 in response to a user operation, and supplies an operation signal corresponding to the signal RM to the system controller 112. Is configured.

Further, the receiver main body 110 selects a receiving antenna 121 for receiving a digital broadcasting signal and a broadcasting signal of a predetermined RF channel from the digital broadcasting signals of a plurality of RF channels received by the receiving antenna 121. However, MPEG2 (Moving PictureEx) as a data stream corresponding to the broadcast signal of the predetermined RF channel is used.
perts Group 2) tuner section 122 for obtaining a transport stream TS. This transport stream TS is made up of consecutive MPEG2 TS packets.

The receiver body 110 also has a demultiplexer 123. This demultiplexer 123
Is the transport output from the tuner unit 122.
A packet of video data or audio data of a predetermined program is separated from the stream TS or a transport stream TS reproduced from the recording device 150 and input to the port 111, and a video data stream VDS or audio composed of these packets is separated. Output the data stream ADS.

Further, the demultiplexer 123 separates the additional data packet from the above-mentioned transport stream TS and outputs the additional data stream SDS including the packet. This additional data stream SDS is supplied to the system controller 112.

Further, the receiver main body 110 has the video data stream V output from the demultiplexer 123.
A video decoder 124 that obtains video data VD as image data by subjecting DS to MPEG2 decoding;
It has a display 125 for displaying an image based on the video data VD. The display 125 is, for example, a CRT (cathode-ray tube) display, an LCD (liq
It is an image display device such as a uid crystal display) or a PDP (plasma display).

FIG. 2 shows the structure of the video decoder 124. The video decoder 124 includes a buffer 124a for temporarily storing the video data stream VDS.
Read the video data stream VDS stored in the buffer 124a,
The decoder unit 124b that obtains the video data VD by performing the MPEG2 decoding process on the stream VDS, the output buffer 124c that temporarily stores the image data Vb output from the decoder unit 124b, and the output buffer 124c. A write / read control unit (W / R control unit) 124d for controlling the write / read operation is included.

Further, returning to FIG. 1, the receiver main body 110
Is an output gate circuit 12 for controlling connection / disconnection of a signal path between the video decoder 124 and the display 125.
6 and an OSD for generating a display signal SCH for displaying a character graphic or the like on the screen of the display 125.
(On Screen Display) circuit 127 and its display signal SC
And a synthesizer 128 for synthesizing H into the video data VD output from the output gate circuit 126 and supplying it to the display 125. OSD circuit 127
The generation operation of the display signal SCH in is controlled by the system controller 112.

Further, the receiver main body 110 outputs an audio decoder 129 which obtains audio data AD by subjecting the audio data stream ADS outputted from the demultiplexer 123 to data expansion processing, and a sound based on the audio data AD. Speaker 130
And have.

The operation of the digital broadcast receiver 100 shown in FIG. 1 will be described. First, the operation in the case of outputting an image or sound by the received transport stream TS will be described. Digital broadcast signals of a plurality of RF channels received by the antenna 121 are supplied to the tuner unit 122,
A broadcast signal of a predetermined RF channel is selected, and the tuner section 122 obtains an MPEG2 transport stream TS corresponding to the broadcast signal.

Then, this transport stream TS is supplied to the demultiplexer 123. In this demultiplexer 123, the remote control transmitter 20 of the user
The operation of 0 separates the packets of the video data and the audio data of the program number (channel) designated, and the video data stream VDS and the audio data stream ADS composed of these packets are obtained.

Further, in the demultiplexer 123, the additional data packet is separated from the transport stream TS, and the additional data stream SDS including the packet is supplied to the system controller 112. This additional data stream SDS contains PSI
(Program Specific Information) data is included and used for channel selection processing and the like.

The video data stream VDS output from the demultiplexer 123 is subjected to MPEG2 decoding by the video decoder 124 to obtain video data VD as image data. The video data VD is supplied to the display 125 via the output gate circuit 126 and the combiner 128. This allows
An image based on the video data VD is displayed on the display 125.

The audio decoder 129 performs data expansion processing on the audio data stream ADS output from the demultiplexer 123 to generate output audio data AD, which is supplied to the speaker 130. It This allows
From the speaker 130, a sound based on the audio data AD is output.

Next, the operation of sending the received transport stream TS to the recording device 150 for recording will be described. Digital broadcast signals of a plurality of RF channels received by the antenna 121 are supplied to a tuner unit 122, a broadcast signal of a predetermined RF channel is selected, and the tuner unit 122 selects MPEG2 corresponding to the broadcast signals.
A transport stream TS is obtained. This transport stream TS is i. LINK port 1
11 is supplied.

In this state, the remote control transmitter 20 of the user
When recording is instructed by the operation of 0, the system controller 112 sends the i. A recording command is sent to the cable 160 via the LINK port 111. This recording command is issued by the recording device 150 i. The recording device 150 is supplied to the LINK port 151, and enters the recording state. In this recording state, the transport stream TS output from the tuner unit 122 is i. LINK port 11
1, cable 160, i. It is supplied to and recorded in the recording unit 152 via the LINK port 151.

Next, the operation of outputting an image or sound by the transport stream TS recorded in the recording device 150 will be described with reference to the sequence diagram of FIG. When reproduction is instructed by the user's operation of the remote control transmitter 200, the i. A reproduction command is sent to the cable 160 via the LINK port 111. This playback command is issued by the i. The recording device 150 is supplied to the LINK port 151, and the recording device 150 enters the reproduction state. In this reproduction state, the transport stream TS reproduced from the recording unit 152 of the recording device 150 is i. LINK port 151,
Cable 160, i. It is supplied to the demultiplexer 123 via the LINK port 111.

The demultiplexer 123 separates packets of video data and audio data of a predetermined program (program) and obtains a video data stream VDS and an audio data stream ADS composed of these packets. Further, in the demultiplexer 123, from the transport stream TS,
The packet of additional data is separated, and the additional data stream SDS including the packet is supplied to the system controller 112.

In this additional data stream SDS,
For example, as PSI data, SIT (Service Informati
on Table) data exists. This SIT is shown in FIG.
As shown in, there are data of the number of video ES (Elementary Stream), the number of audio ES, and the default ES. In the demultiplexer 123 described above, when the transport stream TS is first input, packets of video data and audio data of a program corresponding to the default ES are separated.

However, when a program is subsequently selected by the user operating the remote control transmitter 200, the video data and audio data packets of the selected program are separated. A program can be selected, for example, in a state where a program explanation screen as shown in FIG. 5 is displayed on the display 125. This program explanation screen is based on the data of the number of video ES and the number of audio ES of the SIT described above.
The display is performed by generating the display signal SCH in the OSD circuit 127. The program explanation screen of FIG. 5 shows that there are three video and audio programs, respectively, and that video 2 and audio 2 are selected.

The video data stream VDS output from the demultiplexer 123 is supplied to the video decoder 124 and stored in the buffer 124a. As described above, when reproduction is instructed by the user operating the remote control transmitter 200, the system controller 112
Instructs the video decoder 124 to start decoding (see FIG. 3).

Therefore, in the decoder section 124b of the video decoder 124, the video data stream VDS stored in the buffer 124a is subjected to MPEG2 decoding to obtain video data VD as image data. Then, the video data VD obtained by being decoded by the decoder unit 124b is written into the output buffer 124c, and the video data VD is sequentially read from the output buffer 124c.
Is the output of the video decoder 124.

When reproduction is instructed by the user operating the remote control transmitter 200 as described above, the system controller 112 instructs the output gate circuit 126 to open the output gate (see FIG. 3). Therefore, the signal path between the video decoder 124 and the display 125 is in the connected state. Therefore, the video data VD output from the video decoder 124 is supplied to the display 125 via the output gate circuit 126 and the combiner 128. As a result, the reproduced image based on the video data VD is displayed on the display 125.

The audio data stream ADS output from the demultiplexer 123 is supplied to the audio decoder 129. When reproduction is instructed by the user operating the remote control transmitter 200 as described above, the system controller 112 instructs the audio decoder 129 to start decoding. Therefore, in the audio decoder 129, data decompression processing is performed on the audio data stream ADS to generate output audio data AD. Then, this audio data AD is supplied to the speaker 130. As a result, the speaker 130 outputs the reproduced sound based on the audio data AD.

A case where a pause is instructed by the user's operation of the remote control transmitter 200 in the reproduction state as described above will be described. In this case, from the system controller 112, i. A pause command is sent to the cable 160 via the LINK port 111. This pause command is issued by the i. LINK port 15
1 and the recording device 150 is in a pause (playback pause) state. It should be noted that the recording device 150 does not supply the data stream for displaying the pause image to the receiver main body 110 when the recording device 150 enters the pause state, as described above.

As described above, the user remote control transmitter 2
When the pause operation is instructed by the operation of 00, the system controller 112 instructs the video decoder 124 to stop the writing of the output buffer 124c (see FIG. 3). As a result, writing to the output buffer 124c is prohibited. Therefore, the output buffer 124c
Indicates that overwriting is prohibited, and the last 1
The video data VD for frames is held as it is. In this state, the output buffer 124
One frame of video data VD stored in c is repeatedly read and output.

In this case, the system controller 11
2 further includes a decoder unit 12 in the video decoder 124.
It may be instructed to stop the decoding operation in 4b. In this way, by stopping the decoding operation of the decoder unit 124b, it is possible to prevent unnecessary power consumption.

Further, since the signal path between the video decoder 124 and the display 125 is connected by the output gate circuit 126, the video data output from the output buffer 124c of the video decoder 124 as described above. The VD is supplied to the display 125 via the output gate circuit 126 and the combiner 128.
As a result, a still image based on the video data VD is displayed on the display 125, and the user can know that the recording device 150 is in the paused state.

When a pause is instructed by the user operating the remote control transmitter 200 as described above, the system controller 112 causes the audio decoder 129.
Is instructed to stop the output of the audio data AD and enter the muting state. As a result, the speaker 1
Audio data AD is not supplied to 30, and no sound is output from the speaker 130.

A case will be described below in which the user is instructed to cancel the pause by operating the remote control transmitter 200 in the pause state. In this case, the system controller 112 sends i. A pause cancel command is sent to the cable 160 via the LINK port 111. This pause cancel command is issued by the i. The recording device 150 is supplied to the LINK port 151, and the recording device 150 is in the reproduction state again. In this reproduction state, the transport stream TS reproduced from the recording unit 152 of the recording device 150 is i. LIN
K port 151, cable 160, i. It is supplied to the demultiplexer 123 via the LINK port 111.

Then, in this demultiplexer 123,
Video data and audio data packets of a predetermined program (program) are separated from the transport stream TS, and video data consisting of these packets are separated.
Stream VDS and audio data stream AD
S is obtained.

The video data stream VDS output from the demultiplexer 123 is supplied to the video decoder 124 and stored in the buffer 124a. Then, the decoder unit 124b is added to the video data stream VDS stored in the buffer 124a in this way.
Then, MPEG2 decoding is performed to obtain video data VD as image data.

In this case, when the system controller 112 instructs the video decoder 124 to stop the decoding operation in the decoder section 124b at the time of the above-mentioned pause instruction, and the decoder section 124b stops the decoding operation, the above-mentioned operation is performed. When the pause release is instructed by the user's operation of the remote control transmitter 200 as described above, the system controller 112 instructs the video decoder 124 to restart the decoding operation of the decoder unit 124b, and the decoder unit 12 is restarted.
The decoding operation in 4b is restarted.

As described above, the user remote control transmitter 2
When the pause release is instructed by the operation of 00, the system controller 112 instructs the video decoder 124 to restart the writing of the output buffer 124c (see FIG. 3). Therefore, as described above, the decoder unit 124b
The video data VD obtained by being decoded in (1) is written in the output buffer 124c and is sequentially read out from the output buffer 124c. The read video data VD becomes the output of the video decoder 124.

Since the signal path between the video decoder 124 and the display 125 is connected by the output gate circuit 126, the video decoder 1
The video data VD output from the display 24 is sent to the display 12 via the output gate circuit 126 and the synthesizer 128.
5 is supplied. As a result, the reproduced image based on the video data VD is displayed again on the display 125.

The audio data stream ADS output from the demultiplexer 123 is supplied to the audio decoder 129. As described above, when the pause cancellation is instructed by the user's operation of the remote control transmitter 200, the system controller 112 instructs the audio decoder 129 to cancel the output stop of the audio data AD. Therefore, in the audio decoder 129, data decompression processing is performed on the audio data stream ADS to generate output audio data AD. Then, this audio data AD is supplied to the speaker 130. As a result, the reproduced sound of the audio data AD is output again from the speaker 130.

Further, a case will be described in which the stop instruction is given by the user's operation of the remote control transmitter 200 in the reproduction state or in the pause state. When the stop operation is instructed by the user operating the remote control transmitter 200, the i. LIN
A stop command is sent to the cable 160 via the K port 111. This stop command is issued by the recording device 150 i. This recording device 1 is supplied to the LINK port 151.
50 is stopped.

When the user instructs the remote controller transmitter 200 to stop, the system controller 112 instructs the video decoder 124 to stop decoding (see FIG. 3). Therefore, the decoding operation of the video decoder 124 is stopped. Further, at this time, the system controller 112 sets the output gate circuit 1
26 is instructed to close the output gate (see FIG. 3). Therefore, the signal path between the video decoder 124 and the display 125 is disconnected. As a result, no image is displayed on the display 125.

At this time, the system controller 11
2 instructs the audio decoder 124 to stop decoding. Therefore, the decoding operation of the audio decoder 129 is stopped. As a result, no sound is output from the speaker 130.

The flowchart of FIG. 6 shows the recording device 150.
System controller 11 related to playback, pause, etc.
2 shows a control operation of No. 2. First, in step ST1,
When reproduction is instructed by the user operating the remote control transmitter 200, in step ST2, i. LINK port 1
Send a playback command to the cable 160 via 11,
The recording device 150 is set in the reproduction state.

Next, in step ST3, the video decoder 124 and the audio decoder 129 are instructed to start decoding, and the decoding process is started. And step S
At T4, the output gate circuit 126 is instructed to open the output gate, and the signal path between the video decoder 124 and the display 125 is brought into a connected state.

As a result, the video data VD is output from the video decoder 124, the video data VD is supplied to the display 125 via the output gate circuit 126, and the reproduced image is displayed on the display 125. Also, audio data AD is output from the audio decoder 129, this audio data AD is supplied to the speaker 130, and reproduced sound is output from this speaker 130.

Next, in step ST5, it is determined whether or not the user has operated the remote control transmitter 200 (user operation). When there is a user operation, step ST6
Then, it is determined whether or not it is a pause operation. If it is not a pause operation, a process corresponding to the user operation is performed in step ST17.

If it is a pause operation, step ST7
Proceed to. In this step ST7, i. A pause command is sent to the cable 160 via the LINK port 111 to put the recording device 150 into a pause (playback pause) state. Then, in step ST8, the video decoder 124
To stop writing to the output buffer 124c. As a result, the output buffer 124c is prohibited from being overwritten, and the last one frame of the video data VD in the reproduction state is reproduced.
Is held, and the video data VD for one frame is repeatedly read. The video data VD is supplied to the display 125 via the output gate circuit 126, and a still image is displayed on the display 125. This allows the user to recognize that the user is in the paused state.

In step ST8, the audio decoder 129 is instructed to perform muting. As a result, the audio decoder 129 is in a state of not outputting the audio data AD. Therefore, the speaker 13
No sound is output from 0.

Next, in step ST9, it is determined whether or not there is a user operation. When there is a user operation, it is determined in step ST10 whether or not it is a pause canceling operation. When it is not the pause releasing operation, it is determined in step ST11 whether or not it is the stopping operation. In this step ST11,
If it is not a stop operation, a process corresponding to the user operation is performed in step ST17.

If the pause cancel operation is performed in step ST10, in step ST12, i. LINK port 1
A pause cancel command is sent to the cable 160 via 11 to put the recording device 150 into the reproduction state again. And
In step ST13, the video decoder 124 is instructed to release the write stop of the output buffer 124c. As a result, writing of the video data VD output from the decoder unit 124b to the output buffer 124c is restarted. In addition, in this step ST13, the audio decoder 129 is instructed to cancel muting. As a result, the audio decoder 129 causes the audio data A
It becomes a state of outputting D. Therefore, the display 12
The reproduced image is displayed again at 5, and the reproduced sound is output again from the speaker 130. After the process of step ST13, the process returns to step ST5 and the same process as described above is repeated.

If the stop operation is determined in step ST11, the process proceeds to step ST14. In this step ST14, i. A stop command is sent to the cable 160 via the LINK port 111, and the recording device 150
To stop. Then, in step ST15, the video decoder 124 and the audio decoder 129 are instructed to stop decoding, and the decoding process is ended. And
In step ST16, the output gate circuit 126 is instructed to close the output gate, and the video decoder 124 and the display 1 are connected.
The signal path to and from 25 is set to the non-connection state.

As described above, in the present embodiment, when the pause command is sent to the recording device 150 to put the recording device 150 into the pause state, the video decoder 1
Writing of 24 output buffers 124c is stopped.
Therefore, the output buffer 124c is in a state where overwriting is prohibited, the last video data VD in the reproduction state is held, and the video data VD is repeatedly read.

Therefore, even if the recording device 150 does not output the data stream including the image data for pause when the recording device 150 is in the paused state, it is possible to display the pseudo image (still image) on the display 125. As a result, the recording device 1
The user may be informed that 50 is in a pose.

In the above embodiment, the transport stream TS including the MPEG2-encoded image data is used as the encoded image data. However, the present invention deals with images by other encoding. It can be similarly applied to those handling a data stream containing data.

In the above embodiment, the receiver main body 110 includes the display 125 and the speaker 130, but the display 125 and the speaker 130 are separate from the receiver main body 110. Good.

Further, although the present invention is applied to the digital broadcast receiver 100 in the above-described embodiments, the present invention is also applicable to a reproduction-only device which does not have a recording system for the recording device 150. Of course, the same can be applied.

In the above embodiment, the recording device 150 is connected to the receiver main body 110 via the IEEE 1394 (i.LINK) digital interface, but other digital interfaces are used. It may be.

Further, in the above-described embodiment, it has been described that the recording device 150 does not output the data stream including the image data for pause when the recording device 150 is in the pause state. However, if there is a possibility to connect a recording device that outputs the data stream including the image data for the pause in the paused state, for example, the presence or absence of the output of the data stream is detected in the paused state, and the above operation is performed only when there is no output. The same operation as in the above-described mode may be performed, and if there is, a pause image based on the image data for pause may be displayed on the display 125 as an operation similar to the reproduction state.

[0078]

According to the present invention, the encoded image data included in the data stream reproduced by the recording device is decoded and then output via the output buffer, and the pause command is issued to the recording device. When sending and putting this recording device in the paused state, the writing of the output buffer is stopped and the image data stored in this output buffer is repeatedly read and output. Even if the data stream containing the data is not output, the pause image can be displayed in a pseudo manner, and the user can be notified that the recording device is in the pause state.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a digital broadcast receiver as an embodiment.

FIG. 2 is a block diagram showing a configuration of a video decoder.

FIG. 3 is a sequence diagram relating to operations such as reproduction and pause.

FIG. 4 is a diagram showing a part of a data structure of SIT.

FIG. 5 is a diagram showing a program explanation screen.

FIG. 6 is a flowchart for explaining a control operation of the system controller.

FIG. 7 is a block diagram showing a configuration of a conventional image data processing system.

FIG. 8 is a sequence diagram relating to operations such as conventional reproduction and pause.

[Explanation of symbols]

100 ... Digital broadcast receiver, 110 ... Receiver main body, 111 ... i. LINK port, 112 ...
System controller, 113 ... Remote control signal receiving circuit, 121 ... Receiving antenna, 122 ... Tuner section, 123 ... Demultiplexer, 124 ... Video decoder, 124a ... Buffer, 124b ...
Decoder unit, 124c ... Output buffer, 124d
... Writing / reading control unit, 125 ... Display, 126 ... Output gate circuit, 127 ... OS
D circuit, 128 ... Synthesizer, 129 ... Audio decoder, 130 ... Speaker, 150 ... Recording device, 151 ... i. LINK port, 152 ... Recording unit, 160 ... Cable

   ─────────────────────────────────────────────────── ─── Continued front page    (54) [Title of Invention] Processing apparatus and processing method for reproduced data stream, program for executing the method, and                     Computer-readable medium recording the program, and image display device using the medium                     Setting

Claims (7)

[Claims] 1. An operation control means for sending a command via a digital interface to a recording device recording a data stream containing at least encoded image data to control the operation of the recording device, and the operation control means. When the playback command is sent to the recording device to bring the recording device into the playback state, the encoded image data included in the data stream supplied from the recording device via the digital interface is decoded. Decoding means, an output buffer for temporarily storing the image data output from the decoding means, a write / read control means for controlling writing and reading of the output buffer, and an operation control means for controlling the recording device. When sending a pause command to put the recorder in the pause state, the output buffer It reproduced data stream processing device, characterized in that it comprises a control means for controlling the write and read control means so as to stop writing. 2. The write / read control for restarting the writing of the output buffer when the operation control means sends a pause cancel command to the recording device to put the recording device in a reproducing state again. The reproduction data stream processing device according to claim 1, characterized in that it controls the means. 3. The control means controls the decoding means so as to further stop the decoding operation when the operation control means sends a pause command to the recording equipment to put the recording equipment in the paused state. The reproduction data stream processing device according to claim 1, wherein 4. When the recording device which records a data stream including at least encoded image data is sent a reproduction command through a digital interface to bring the recording device into a reproduction state, the digital signal is output from the recording device. Decoding the encoded image data contained in the data stream supplied via the interface,
When the image data obtained by the decoding is written in the output buffer, read out from the output buffer and output, and the pause command is sent to the recording device through the digital interface to put the recording device into the pause state, the output A reproduction data stream processing method, characterized in that writing to a buffer is stopped, and image data stored in the output buffer is repeatedly read and output. 5. When the playback device is put into a playback state by sending a playback command via a digital interface to a recording device that is recording a data stream including at least encoded image data, the digital signal is output from the recording device. Decoding the encoded image data contained in the data stream supplied via the interface,
When the image data obtained by the decoding is written in the output buffer, read out from the output buffer and output, and the pause command is sent to the recording device through the digital interface to put the recording device into the pause state, the output A computer-readable medium in which a program for causing a computer to execute a reproduction data stream processing method of stopping writing in a buffer and repeatedly reading and outputting image data stored in the output buffer is output. 6. When the reproduction command is sent to a recording device which records a data stream including at least encoded image data through a digital interface to bring the recording device into a reproducing state, the digital signal is output from the recording device. Decoding the encoded image data contained in the data stream supplied via the interface,
When the image data obtained by the decoding is written in the output buffer, read out from the output buffer and output, and the pause command is sent to the recording device through the digital interface to put the recording device into the pause state, the output A program for causing a computer to execute a reproduction data stream processing method of stopping writing in a buffer, repeatedly reading and outputting image data stored in the output buffer. 7. An operation control means for sending a command to a recording device, which records a data stream including at least encoded image data, through a digital interface to control the operation of the recording device, and the operation control means. When the reproduction command is sent to the recording device to bring the recording device into the reproduction state, the encoded image data included in the data stream supplied from the recording device through the digital interface is decoded. Decoding means, an output buffer for temporarily storing the image data output from the decoding means, a write / read control means for controlling writing and reading of the output buffer, and an operation control means for controlling the recording device. When sending a pause command to put the recording device into the pause state, the output buffer And control means for controlling the write and read control means to stop the writing of the image display apparatus characterized by comprising a display for displaying images according to image data output from the output buffer.