JP2006148637A - Image processing system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize an image processing system for generating a plurality of image signals to which copying control information is attached as a multi-screen signal that is properly subjected to copying control. <P>SOLUTION: This image processing system comprises a video recording function determining part 21 for determining whether a video recording function belongs to a device to be connected to a viewing video output terminal for outputting a broadcast program for main screen display obtained by reception and a broadcast program to be projected on one or a plurality of subscreens by screen separation, and an adaptation processing part 18 for stopping outputting a broadcast program including video recording inhibition information on the basis of the video recording inhibition information included in the broadcast program when it is determined that the video recording function belongs to the device. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an image processing system that receives a plurality of programs received with copy control information and outputs a video signal for split-displaying a parent screen and a child screen at the same time.

Recently, broadcast programs to which copy control information is attached have been received by satellite digital broadcasting or terrestrial digital broadcasting. When the digital broadcast receiving apparatus can receive a plurality of broadcasts, the main program and the so-called back program are displayed by displaying one program as a parent screen and the other program as a child screen in an area provided in the parent screen. It can be viewed at the same time with a small screen.
On the other hand, DTCP (Digital Transmission Content Protection) _CCI (Copy Control Information) is attached to a program received through digital broadcasting, and is the received program prohibited from being copied or can be copied only once? Information on whether or not to copy freely is attached and transmitted together with the program.

Patent Document 1 discloses a digital broadcast receiving apparatus that obtains copy control information related to a designated received program from among a plurality of programs received simultaneously, sets a VCR recording mode, and records the received program. Has been.
In Patent Document 2, a video signal format for a plurality of received programs is identified, a reduced screen is generated by performing adaptive filtering according to the identified video format, and a child screen is displayed in the parent screen. Has been disclosed.

Here, the multiple program display processing apparatus may be configured by a receiving tuner that receives a plurality of programs, a monitor TV that displays a video signal, and a digital VTR that records the video signal. The video output of a receiving tuner that is generally commercially available includes a video output for viewing for connection to a monitor TV and a video output for recording for connection to a recorder that records the received program. In the case of a receiving tuner having a parent-child two-screen display function, a video signal displayed on the parent-child two-screen is output as a viewing video output, and a video signal of the main program (parent screen) is output as a recording video output. The user can view the back program on the sub-screen and only the program on the main screen is recorded. Since copy control information is attached to the video output for recording, the digital VTR that records the video output for recording can obtain and record the video output for recording within the permitted range.
JP 2004-104752 A JP 2000-209521 A

  By the way, a parent-child two-screen signal on the premise that a monitor TV is connected is output to the viewing video output. Since the parent / child two-screen signal may be used by being connected to a digital VTR and recorded, it is also possible. Therefore, the viewing video output is output with copy control information. When the same DTCP_CCI is attached to both the program received as the parent screen and the program received as the child screen, the video signal of the parent and child two screens is recorded within the permitted range. Recording suitable for a user who desires simultaneous recording on two screens can be performed.

  However, when different DTCP_CCI is attached to the parent screen and the child screen and received, if the DTCP_CCI attached to the parent / child two-screen signal is the same as the DTCP_CCI of the parent screen, for example, the child screen prohibited from recording is recorded at the same time. End up. If the DTCP_CCI of the child screen in that case prohibits recording a high quality image, it will be permitted to record the child screen at the same time. However, if even low-resolution recording is prohibited, it is an undesirable small screen recording. Since the current DTCP_CCI cannot be obtained as recording restriction information in consideration of the screen resolution, accurate control cannot be performed for the recording of the sub-screen.

  Although it is possible to add and copy control of DTCP_CCI to the parent screen using Patent Document 1 and Patent Document 2, when the DTCP_CCI different from the parent screen is attached to the program for displaying the child screen, the DTCP_CCI of the child screen is particularly used. There is no description or suggestion about what to do with DTCP_CCI attached to the parent-child two-screen signal when recording is prohibited.

As a method of generating a parent-child two-screen signal using DTCP_CCI attached to each program used when generating the parent-child two-screen, when the restriction condition of DTCP_CCI attached to the child screen is narrower than the restriction condition of the parent screen (1) It is conceivable to stop displaying the sub-screen, (2) make the sub-screen area a single color screen, or (3) output DTCP_CCI in accordance with the sub-screen. In the case of (1) and (2), there is a problem that the parent-child two-screen signal is not displayed on the monitor TV even if the recording is not aimed. In the case of (3), the child screen is changed when the reception channel of the child screen is changed. Due to the control signal related to the recording prohibition, there is a problem that the recording is stopped together with the main screen.
To realize a receiving tuner that combines a plurality of image signals received with copy control information by a main screen and one or more sub-screens and outputs them as a multi-screen signal that is appropriately copy-controlled. I can't.

  Accordingly, the present invention has been made to solve the above-described problems, and a plurality of image signals received with copy control information are combined into a parent screen and one or more child screens. In addition, an object of the present invention is to provide an image processing system that can output a multi-screen signal that is appropriately copy-controlled.

  In the present invention, a main program among a plurality of broadcast programs including copy prohibition information is received by a first receiving unit, an auxiliary program serving as a sub is received by a second receiving unit, and the first receiving unit is When the copy prohibition information is included in the main program received via the network, the copy prohibition information is extracted and output to the video terminal for recording together with the main program and received via the second receiver. An image processing unit that outputs the auxiliary program to the receiver video output terminal together with the copy prohibition information included in the main program, and a device having a recording function is connected to the receiver terminal In addition, in the image processing system having an image processing unit that prevents the auxiliary program received with the copy prohibition information from being recorded on the recording device, the image processing unit is connected to the receiver terminal. The device It is included in the broadcast program when it is determined that the recording function determination unit determines whether it has a recording function and outputs the result, and when the recording function determination unit determines that the device has the recording function. And an adaptive processing unit that stops outputting the broadcast program including the copy prohibition information to the apparatus based on the copy prohibition information.

  According to the present invention, the image processing unit determines whether or not the device connected to the receiver terminal has a recording function, and outputs a result thereof. When the recording function determination unit determines that the recording function is provided, the output of the broadcast program including the copy prohibition information to the device is stopped based on the copy prohibition information included in the broadcast program. A multi-screen signal that is composed of a plurality of image signals received with copy control information and combined with a main screen and one or more sub-screens, and is appropriately copy-controlled. Can be realized.

The image processing system according to each embodiment of the present invention will be described below with reference to FIGS.
FIG. 1 is a block diagram illustrating a configuration example of an image processing system according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating a display example of a multi-screen.
FIG. 3 is a flowchart showing the operation of the image processing system according to the embodiment of the present invention.

  The image processing system combines a plurality of image signals received with copy control information by a main screen and one or more sub-screens, and outputs it as a multi-screen signal that is appropriately copy-controlled. The image processing unit determines whether or not a device connected to a terminal that outputs a broadcast program displayed on one or more sub-screens of the receiver has a recording function, and the result is obtained. A recording function determining unit to output, and when the recording function determining unit determines that the device has the recording function, the recording prohibition to the device based on recording prohibition information included in the broadcast program This is realized by using an adaptive processing unit that stops outputting broadcast programs including information.

The configuration of the image processing system will be described.
An image processing system 1 shown in FIG. 1 includes a tuner 11, a tuner 12, a decoder 13, a decoder 14, a copy control information acquisition unit 15, a copy control information acquisition unit 16, a comparison unit 17, a matching processing unit 18, and a multi-screen generation unit 19. , A recording function determination unit 21, a device information acquisition unit 22, an interface 23, an interface 24, and a device control unit 25.
An antenna is connected to the tuner 11 and the tuner 12. The device control unit 25 is connected to the remote controller 3 by infrared light. A video signal for recording is output from the interface 23, and a video signal for viewing is output from the interface 24.

The operation of the image processing system will be described.
First, the apparatus control unit 25 performs communication with a device connected via the interface 24 by, for example, a signal format of IEEE (Institute of Electrical and Electronics Engineers 802.11 activities) 1394. The device information of the connected device obtained by communication is acquired by the device information acquisition unit 22. The recording function determination unit 21 compares the device information with a device information table (not shown) stored in advance, and determines whether the connected device has a recording function.

  The remote controller 3 is operated to specify a program to be viewed on the main screen. The tuner 11 receives the broadcast for the main screen and obtains a TS (Transport Stream) signal. Of the TS signal, a video signal is decoded by the decoder 13 to obtain a video signal. Of the TS signal, a signal related to DTCP (Digital Transmission Content Protection) _CCI (Copy Control Information) is acquired by the copy control information acquisition unit 15. The video signal decoded by the decoder 13 and the copy information acquired by the copy control information acquisition unit 15 are input to the interface 23. There, it is generated as a signal in a format compliant with IEEE 1394 and output as a video signal for recording.

Next, a case where a program to be viewed on the parent screen is designated by operating the remote controller 3 will be described.
The tuner 12 receives the program for the small screen, and the video signal is decoded by the decoder 14. The DTCP_CCI information is acquired by the copy control information acquisition unit 16. The comparison unit 17 compares the copy control information for the parent screen and the control information for the child screen. From the comparison unit 17, there is a case where the device to which the video signal for viewing is connected by the recording function determination unit 21 has a recording function, and the control information information for the child screen is narrower than the control information of the parent screen Detect whether recording is restricted under the conditions. The adaptation processing unit 18 performs adaptation processing of the video signal input from the decoder 14 when a detection output indicating that the condition is restricted is obtained from the comparison unit 17. The adaptation processing includes, for example, reducing the resolution of the image, converting the moving image into a still image sampled in seconds, or converting the moving image into a single color image. Which of these adaptation processes is selected is determined by a level that satisfies the requirements of the program right holder set with the times.

The small-screen video signal subjected to the adaptation process by the adaptation processing unit 18 is generated as a multi-screen by the multi-screen generation unit 19, and the copy control information for the parent screen obtained by the copy control information acquisition unit 15 by the interface 24 is obtained. Attached. It is output as a viewing output video signal.
The adaptation processing is performed by the adaptation processing unit 18 when a device having a recording function is connected to the viewing video output terminal. For example, in the case of a receiver that can be combined with a recording function such as a hard disk recorder, it cannot be specified whether or not it has a recording function even if the model name is specified. In that case, the adaptation processing in the adaptation processing unit 18 may be stopped only when a status signal indicating that it does not have a recording function is returned through communication with the receiver via the interface 24. .

With reference to FIG. 2, the display image of the two-parent screen will be described.
(A) is a case where a child screen reduced to ¼ each in the vertical and horizontal directions is displayed on the parent screen. Whether or not the adaptation processing is also performed on the child screen in this case is determined by a requirement condition in that era.
(B) is a case where an SDTV (standard definition television) image and three SDTV images reduced to 1/3 in both the vertical and horizontal directions are displayed on a high-definition screen having a screen aspect ratio of 16: 9. The sub-screen can be displayed with an image quality that can be appreciated, although the resolution is lower than that of a normal SDTV display screen. In this case, adaptation processing is necessary. As the adaptation processing, for example, there is a method of displaying while switching still images every few seconds. In other words, the tuner 12 obtains a video signal while switching the three reception channels for the small screen set by the user, samples the obtained video at a rate of about one frame every few seconds, and displays the obtained still images in order. To do.

A processing flow of the image processing system will be described with reference to FIG.
First, in S (step) 61, multi-screen display is set. In S62, the device information describing the model name connected to the output terminal of the video signal for viewing and the function of the device is acquired. It is detected whether the device connected in S63 has a recording function. If the recording function is not detected, a multi-screen set by operation is generated in S64, and the output of the multi-screen video signal generated in S65 is continued as a viewing video signal. Terminate.

  If it is detected in S63 that the recording function is provided, the control information of the program received for the main screen is acquired in S66. In step S67, control information of the program received for the child screen is acquired. In S68, the copy restriction on the parent screen is compared with the copy restriction on the child screen. When the restriction on the small screen is larger, the adaptation process is performed on the small screen image. A multi-screen is generated in S71. In S72, it is detected whether the reception channel of the small-screen program has been changed. If changed, the steps from S67 are repeated. If not changed, a multi-screen video signal is output. In S74, it is detected whether the multi-screen display has been canceled. If not, the steps from S66 are repeated. If canceled, the processing after S66 is terminated.

  As described above, according to the image processing system 1 shown in the present embodiment, the image processing unit is connected to the viewing video output terminal that outputs the broadcast program displayed on one or a plurality of sub-screens of the receiver. It is determined whether or not the device has a recording function, and a recording function determination unit 21 that outputs the result, and when the recording function determination unit 21 determines that the device has the recording function, the broadcast program And the adaptation processing unit 18 that stops outputting the broadcast program including the recording prohibition information to the device based on the recording prohibition information included in the video recording reception information. It is possible to realize an image processing system that enables a plurality of image signals to be combined with a main screen and one or more sub-screens and output as a multi-screen signal that is appropriately copy-controlled.

  The present invention can be applied to a digital broadcast receiving tuner that receives a plurality of programs received with copy control information and outputs a video signal for displaying a multi-screen video by a main screen and a sub-screen.

It is a block diagram which shows the structural example of the image processing system which concerns on implementation of this invention. It is a figure which shows the example of a display of a multiscreen. It is the figure which showed the operation | movement of the image processing system which concerns on implementation of this invention with the flowchart.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image processing system 3 Remote control 11, 12 Tuner 13, 14 Decoder 15, 16 Copy control information acquisition part 17 Comparison part 18 Conformity processing part 19 Multi-screen production | generation part 21 Recording function determination part 22 Device information acquisition part 23, 24 Interface 25 Apparatus Control unit

Claims (1)

Among the plurality of broadcast programs including copy prohibition information, the main main program is received by the first receiving unit, the sub auxiliary program is received by the second receiving unit, and is received via the first receiving unit. When the copy prohibition information is included in the main program, the copy prohibition information is extracted and output together with the main program to a video terminal for recording, and the auxiliary program received via the second receiver. An image processing unit that outputs a program to a video output terminal for a receiver together with the copy prohibition information included in the main program, and the copy is performed when a device having a recording function is connected to the receiver terminal. In an image processing system having an image processing unit for preventing recording of the auxiliary program received with prohibition information on the recording device,
The image processing unit
A recording function determination unit that determines whether the device connected to the receiver terminal has a recording function and outputs the result;
When the recording function determining unit determines that the apparatus has the recording function, the broadcast program including the copy prohibition information is output to the apparatus based on the copy prohibition information included in the broadcast program. An adaptation processing unit to stop
An image processing system comprising:

Images