JP2003032569A - Digital broadcast receiver - Google Patents

Abstract

(57) [Summary] [PROBLEMS] When data display is not performed in a data-added TV program in digital broadcasting for performing data broadcasting,
A digital broadcast receiver capable of displaying a high-resolution image without deterioration in image quality is obtained. SOLUTION: Based on data in a multiplexed stream, an image size of moving image data is detected, and it is determined whether or not the resolution is such that moving image mapping is performed. Is displayed, the moving image from the moving image decoding is output as it is as a video without mapping the moving image.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital broadcasting receiver for receiving digital broadcasting, and more particularly to a digital broadcasting receiver for receiving digital broadcasting for data broadcasting.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram showing a configuration example of a conventional digital broadcast receiver. Here, in digital broadcasting, transmission signals such as video, audio, and data information are M
The data is multiplexed according to the PEG2 system, and each data is a packet (Transpor) in the digital broadcast signal.
t Stream Packet, multiplexed streams (Transport Stream, T)
It is called S). In FIG. 5, 201 is a tuner, 202 is demodulation means for performing digital demodulation and selecting and outputting TS as digital data, and 203 is packet separation means (DE) for separating each data packet from TS.
MUX), 204 is moving picture decoding means for decoding moving picture coded data, 205 is audio decoding means for decoding audio coded data, 206 is still picture decoding means, and 207 is character / figure decoding for decoding character / figure data. Reference numeral 208 denotes a switching control data extracting means for extracting data for display and switching control for data broadcasting, 2
Reference numeral 09 is a memory unit for storing still images and character figures, 211 is a moving image mapping unit for converting a moving image into a plane having a predetermined resolution, 212 is a moving image scaling unit, 213 is a still image scaling unit, 214 is a moving image, still image, character The synthesizing means 214 is a synthesizing means for synthesizing figures, and the synthesizing means 214 is constituted by the moving image / still image switching area generating means 215, the moving image / still image switching synthesizing means 216, and the character / graphics synthesizing means 217.
Reference numeral 218 is a control CPU for controlling the above-mentioned respective constituent means, and 219.
Is a remote control.

Next, the operation will be described. When data broadcasting is performed in digital broadcasting, in addition to a program specialized for data broadcasting (independent data program), a television (TV) program (referred to as a data-added TV program) in which video and audio are mainly used and additional data is broadcast at the same event ). Data-added TV
When receiving a program, usually the main video (video),
Although viewing is performed by voice, when the viewer displays additional data by data broadcasting, the remote controller 219
Control CPU2 by pressing the data button in
Data d of the data display instruction is sent from 18, the display control of the data broadcast is performed, each plane (hierarchy) of the moving image, the still image, and the character / graphic is synthesized, and the additional data is displayed. The operation will be described below on the assumption that the data-added TV program is received.

The signal received by the receiving antenna is input to the tuner 201 to select a channel. The channel-selected reception signal is sent to the demodulation means 202, and the demodulation means 202 performs digital demodulation to select and output a TS (Transport Stream) containing the selected program. In the packet separation means 203, the input TS
From the above, the packet of the selected program is separated and taken out, and it is separated into each packet of audio, moving picture coded data, still image, character and graphic data and display for data broadcasting, packet of data related to switching control, etc. And output.

Further, in the packet separating means 203, the transmission control signals (PSI, P
program Specific Information
on), time information and the like are taken out and sent as control information to the control CPU 218, and control data for controlling separation is sent from the control CPU 218. Then, the moving image output from the packet separating means 203,
Each packet of encoded audio data, still image, and character / graphic data is decoded by the moving picture decoding unit 204, the audio decoding unit 205, the still image decoding unit 206, and the character / graphic decoding unit 207, respectively. Further, a packet of data related to display and switching control for data broadcasting is sent to the switching control data extracting means 208 for display,
Data for switching control is extracted, and switching control data for data broadcasting is output.

Here, in displaying a video of a data-added TV program, the decoded moving picture, still picture, and character / graphic data are presented on planes defined by respective predetermined resolutions, and each plane is displayed. It is performed by combining the data for display switching control and the data display instruction d. At this time, a combination of resolutions of moving images, still images, and character / graphic planes that can be used at the same time is defined as “data broadcasting resolution”. For example, in the domestic BS digital broadcasting system standard by ARIB (Association of Radio Industries and Businesses). According to the BS digital broadcasting operation regulation, it is prescribed as shown in FIG. (B
S Digital Broadcast Operation Regulation Technical Data, ARIB TR-B
(15 First Volume)

Further, with respect to the resolution of a specified moving image plane (moving image plane), the resolution of the moving image data that can be presented at each moving image plane resolution, that is, the image size and aspect ratio in MPEG encoding of the image. 7 is defined according to the BS digital broadcasting operation regulation in the BS digital broadcasting system standard as in the case of the above-mentioned data broadcasting resolution. In the figure, the resolution is shown by horizontal size × vertical size (aspect ratio), and the resolution will be similarly described below.

In FIG. 7, when the resolution of the moving image data does not match the resolution of the presentable moving image plane, pixel conversion is performed in the horizontal or vertical direction to map to the moving image plane of a predetermined resolution and present it. To do. Therefore, a progressive scan image (720 with horizontal pixel size 1280, vertical pixel size 720, and aspect ratio 16: 9)
When a data-added TV program is broadcast by (referred to as “p moving image”), horizontal and vertical pixel conversion is performed from FIGS. 6 and 7 and mapping is performed on a 1920 × 1080 (16: 9) moving image plane to perform data broadcasting. Resolution 960 × 5
40 (16: 9) can be combined and presented.

From the above, the switching control data extraction means 208
Then, at the time of receiving the data-added TV program, the data showing the data broadcasting resolution as shown in FIG. 6 is extracted from the packet of the data related to the display and switching control for the data broadcasting separated by the packet separating means 203. For example, 7
When a TV program is transmitted as a 20P moving image, the data has a data broadcast resolution of 960 × 540 (16: 9). Further, the switching control data extraction unit 208 also extracts information indicating scaling information of moving images and still images when synthesizing each plane and data indicating a switching region of moving images and still images, and together with the data indicating the data resolution, the data for data broadcasting. It is output as the switching control data a.

The still picture decoded by the still picture decoding means 206 and the character / figure decoded by the character / figure decoding means 207 are stored in the memory unit 209.
The moving picture data decoded by the moving picture decoding means 204 is sent to the moving picture mapping means 211. The moving image mapping unit 211 converts the input moving image data based on the resolution of the moving image plane corresponding to the data broadcast resolution sent by the switching control data a from the switching control data extracting unit 208. In the case of the 720p moving image, it is converted into a 1920 × 1080 moving image and mapped. If the resolutions match, the resolutions can be presented on the moving image plane of the same size without conversion, and the moving image data of the same size is output.

The moving picture data output from the moving picture mapping means 211 is sent to the moving picture scaling means 212. In the data-added TV program, when the additional data is not displayed and the main video or audio is used for viewing, that is, when the data display instruction d is not issued,
The moving image data output from the moving image mapping unit 211 is directly output as a video from the combining unit 214 without being subjected to the combining process for displaying the data broadcast in the moving image scaling unit 212 and the combining unit 214, and is displayed on the display device. Is sent. Also, the audio decoding means 2
The sound decoded in 05 is also sent to the presentation means such as a speaker.

On the other hand, when the viewer displays the additional data by data broadcasting, the control CPU 218 sends the data d of the data display instruction by pressing the data button on the remote controller 219 or the like. When the data display instruction d is sent to the moving image scaling means 212, the moving image is scaled at a predetermined scaling rate based on the switching control data a from the switching control data extracting means, and then the moving image is moved to the moving image still image in the synthesizing means 214. It is sent to the switching composition means 216. Further, the still image data is sent from the memory unit 209 to the still image scaling unit 213, the still image is scaled at a predetermined scaling rate based on the switching control data a, and then the still image is stored as a moving image still image in the combining unit 214. It is sent to the switching composition means 216. Further, the character / graphic data is sent from the memory unit 209 to the character / graphic synthesizing means 217 in the synthesizing means 214.

Switching area generating means 21 in the synthesizing means 214
In 5, the switching area for moving images and still images is generated based on the switching control data a from the switching control data extracting means. For example, as shown in FIG. 8, a switching area is generated such that switching is performed in a rectangular area on the screen. Next, the moving image / still image switching / combining unit 216 selects and switches the moving image / still image inside / outside of the moving image / still image switching region generated by the switching region generating unit 215, and then switches the moving image / still image. The composite image is sent to the character / graphic composition means 217. Character / figure synthesizing means 21
In step 7, alpha blending is performed on the composite image of the moving image / still image and the character graphic. Then, the video in which the moving image, the still image, and the character and graphic are combined is sent to the display device and displayed.

[0014]

In the conventional digital broadcasting receiver, the resolution of the moving picture data can be presented because the data broadcasting resolution associated with the additional data for the data broadcasting is specified in the reception of the data-added TV program. If it does not match the video plane resolution, it is necessary to perform pixel conversion in the horizontal or vertical direction and map it to the resolution of the specified video plane, and convert the video resolution even when additional data is not displayed. Mapping will be applied. Therefore, even if the TV program is sent with a high-quality image such as 720p, the image resolution is converted by the moving image mapping even when the additional data is not displayed. When viewing such a video, there is a problem that the information of the original video is deteriorated and the video whose image quality is deteriorated is output.

The present invention has been made to solve the above problems, and in receiving a data-added TV program, it is judged whether or not the resolution is such that moving images are mapped from the received data, and the result of this judgment is made. Based on the above, in the case of displaying only a normal video, by not performing the mapping of the moving image even if the resolution is such that the mapping of the moving image is performed, the data-added TV is displayed unless a display instruction of the data broadcast is given. The video of the received program can be sent to the display device as it is without deteriorating the image quality of the moving image in the program, and can be displayed without deteriorating the image quality of the high quality image such as 720p in the data-added TV program. The purpose is to obtain a digital broadcast receiver.

[0016]

A digital broadcast receiver according to the present invention comprises a packet separation means for extracting encoded packets of moving images, audio and additional data related to a program from a multiplex stream which is a digital broadcast signal. Switching control data extraction means for extracting data for controlling display and switching of data broadcast from the packet of additional data and outputting switching control data, and data for instructing whether or not to display the additional data A control unit that outputs a display instruction, a video decoding unit that decodes a coded packet of a moving image, a resolution of the moving image is detected from the multiple stream, and a match and a mismatch with the presentable resolution are discriminated. Based on the data display instruction and the discrimination data, the resolution discrimination means for outputting the discrimination data indicating The image data selecting whether to convert to a predetermined resolution by the switching control data, and has a conversion means for converting directly or resolution video data from said video decoding means.

Further, the resolution discriminating means uses the resolution of the moving image which is defined in advance for data broadcasting as the presentable resolution.

Further, the resolution determining means detects the image size in the horizontal and vertical directions of the moving image by the data of the header portion in the moving image data output from the moving image decoding means as the detection of the resolution of the moving image.

Further, the resolution determining means detects the resolution of the moving picture from the multiple streams and outputs the resolution of the moving picture data, and the resolution of the moving picture indicated by the resolution of the moving picture data and the data broadcasting resolution of the switching control data. And a comparison unit that outputs the comparison result as discrimination data indicating whether the resolutions match or not.

Furthermore, the resolution detecting means detects the resolution indicated by the image size and aspect ratio in the horizontal and vertical directions of the moving image based on the data of the header portion in the moving image data output from the moving image decoding means.

Further, the conversion means converts the moving picture data into the resolution of the corresponding moving picture plane based on the data broadcast resolution sent by the switching control data, and the moving picture decoding means from the moving picture decoding means by the discrimination data and the data display instruction. And a switching means for switching between the moving image data and the moving image data output from the mapping means.

Further, the switching means outputs the moving picture data from the moving picture decoding means when the discriminating data indicates a mismatch and the data display instruction does not display the data.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below with reference to the drawings showing the embodiments thereof. Embodiment 1. FIG. 1 is a block diagram showing an example of the configuration of a digital broadcast receiver according to an embodiment of the present invention.
In the figure, 1 is a tuner, 2 is a digital demodulator,
TS (Multiple Stream, Transport Stream)
am) for selecting and outputting am), 3 is a packet separating means (DEMUX) for extracting and separating encoded packets of a moving image, audio, and additional data related to a program from TS which is a digital broadcast signal, 4 Is a moving picture decoding means for decoding the encoded data of the moving picture, 5 is a voice decoding means for decoding the encoded data of the sound, 6 is a still image decoding means, 7 is a character / figure decoding means for decoding the character / figure data, and 8 is Switching control data extraction means for extracting data for controlling display and switching of data broadcasting from the packet of additional data and outputting the switching control data, 9 is a memory unit for storing still images and character graphics, 10
Is a resolution determining unit that detects the resolution of the moving image based on the moving image data output from the moving image decoding unit 4, determines whether the resolution matches the presentable resolution, and outputs the determination result as determination data f1, and 12 is a moving image scaling unit,
13 is a still image scaling means, 14 is a moving image, a still image,
This is a synthesizing means for synthesizing character and graphics, and the synthesizing means 14 is constituted by the moving image / still image switching area generating means 15, the moving image / still image switching synthesizing means 16, and the character / graphic synthesizing means 17.
Reference numeral 18 denotes a control CPU that controls each of the above-mentioned components and outputs a data display instruction for instructing whether or not to display additional data, 19 is a remote controller, and 20 is based on the data display instruction d and the discrimination data f1. Is a conversion unit that selects whether to convert the moving image data from the moving image decoding unit 4 to a predetermined resolution by the switching control data a, and outputs the moving image data from the moving image decoding unit 4 as it is or after converting the resolution. It is a moving image mapping means.

Next, the operation will be described. Hereinafter, as in the case described above, it is assumed that the data-added TV program is received in the digital broadcast, and normally, the main video and audio are used for viewing, but when the viewer displays the additional data by the data broadcast, By pressing the data button on the remote controller 19 or the like, the data d of the data display instruction is sent from the control CPU 18, the display control of the data broadcast is performed, and the combining of the planes of the moving image, the still image, and the character graphic,
The additional data is displayed. 6 and 7
As will be described below, it is assumed that the data broadcasting resolution and the moving picture plane resolution are defined.

The signal received by the receiving antenna is input to the tuner 1 to select a channel. The channel-selected reception signal is sent to the demodulation means 2, and the demodulation means 2
Then, digital demodulation is performed, and the TS including the selected program is selected and output. In the packet separation means 3, the input TS
Among them, the packets of the selected program are separated and extracted, and separated into the packets of audio and video coded data, still images, character and graphics data and the display for data broadcasting, the packets of data related to switching control, etc. Output. Also,
In the packet separating means 3, the transmission control signal (PSI, Program Spec) transmitted by the TS is transmitted.
if information), time information, etc. are taken out and sent to the control CPU 18 as control information, and control data for controlling separation is sent from the control CPU 18.

The packet of data relating to the switching control separated by the packet separating means 3 is sent to the switching control data extracting means 8. Switching control data extraction means 8
Then, the data showing the data resolution as shown in FIG. 6 is extracted from the packet of the data related to the display and switching control for the data broadcasting. For example, when a TV program is transmitted as a 720P moving image, the data broadcast resolution is 960 × 540.
The data becomes (16: 9). In addition, the data indicating the scaling information of the moving image and the still image and the data indicating the switching region of the moving image and the still image at the time of synthesizing the planes are also extracted and output as the switching control data a for data broadcasting together with the data indicating the data resolution. .

Then, the packets of the moving picture, audio coded data, still picture and character / graphic data outputted from the packet separating means 3 are respectively the moving picture decoding means 4, the audio decoding means 5, the still picture decoding means 6, It is sent to the character / graphic decoding means 7. The audio decoding means 5 decodes the encoded data of the audio and sends the decoded audio to the presentation means such as a speaker. Still image decoding means 6
The still image decoded in (1) and the character / graphic decoded in the character / graphic decoding means 7 are stored in the memory unit 9.

The moving picture decoding means 4 decodes the encoded data of the moving picture and outputs the moving picture data. At the time of decoding, the data of the sequence header in the encoded data is sent to the resolution judging means 10. Resolution discriminating means 1
At 0, the image size (Ver
italical size, Horizontal si
ze) information is detected, and it is determined whether or not the resolution of the detected moving image data matches the presentable moving image plane resolution, that is, whether or not it corresponds to the resolution at which the moving image is mapped.

Here, referring to FIG. 7, HD (High-definition broadcasting with a high transmission rate, High Definition)
TV) Each resolution of moving image data is 1980 x 10
With 80 video plane resolution, SD (standard TV broadcast,
Standard Definition TV) The resolution of moving image data is 720 × 4 with the same aspect ratio.
It can be presented in 80 video plane resolutions. Further, from FIG. 6, the three video plane resolutions correspond to the respective data broadcast resolutions in a one-to-one relationship. Therefore, since the resolution of the moving image plane that can be presented with respect to the image size at the resolution of the moving image data is determined in advance, whether or not the resolution at which moving image mapping is performed can be specified from the image size of the moving image data.

For example, in the case of FIG. 7, comparing the resolution of the moving image data with the resolution of the moving image plane, in the HD moving image data, 1280 × 720 720p moving image, 1440
A video of × 1080 is 54 in SD video data.
4 × 480 and 480 × 480 moving images correspond to moving images that are subjected to pixel conversion and mapping, and in the case of the above four image sizes, the moving image plane resolution does not match.

From the above, the resolution discriminating means 10 detects the image size in the sequence header, and discriminates from the detection result whether the image size is one of the four types described above. For example, the image size is one of the four types. If so, data “1” is output as the discrimination data f1, and otherwise, “0”.
Is output. That is, when a TV program is sent as a 720P moving image, the value “1” is output as the determination data f1.

Although it has been described that the discrimination data f1 outputs a value of "1" or "0", the present invention is not limited to this value, and the result of discriminating whether or not to perform resolution mapping from the image size is described. Should be output.

The moving picture data decoded by the moving picture decoding means 4 and the discrimination data f1 from the resolution detecting means 10 are sent to the moving picture mapping means 20. Figure 2
4 is a block diagram showing an example of the configuration of the moving image mapping unit 20, in which 102 is a mapping unit that converts the moving image data into the resolution of the corresponding moving image plane based on the data broadcast resolution sent by the switching control data a, A switching unit 101 switches between the moving image data from the moving image decoding unit 4 and the moving image data output from the mapping unit 102 according to the determination data f1 and the data display instruction d. The operation of the moving picture mapping means 20 will be described below with reference to FIG.

The moving picture data input from the moving picture decoding means 4 to the moving picture mapping means 20 is sent to the switching means 101 and the mapping means 102. The mapping means 102 converts the resolution into the corresponding moving picture plane based on the data broadcast resolution sent by the switching control data a from the switching control data extracting means 8 and performs mapping. In the case of a 720p moving image, pixels are converted into a 1920 × 1080 moving image in the horizontal and vertical directions and mapped. If the resolutions match, the resolutions can be presented on the moving image plane of the same size without conversion, and the moving image data of the same size is output. The moving image output from the mapping means 102 is the switching means 1
Sent to 01.

In the switching means 101, the resolution discrimination means 10
The moving image from the moving image decoding unit 4 and the moving image data output from the mapping unit 102 are switched according to the discrimination data f1 and the data display instruction d. That is, when the determination data f1 indicates "1" and the data display instruction d is not issued, the moving image from the moving image decoding means 4 is selected and output. When there is the data display instruction d, the moving image data output from the mapping unit 102 is output. On the other hand, when the discrimination data f1 indicates “0”, the conversion is not performed in the mapping means 102, either input may be output in the switching means 101. For example, regardless of the data display instruction d. Without mapping means 1
The video data output from 02 is selected and output.

Therefore, when the 720p moving image is sent in the data-added TV program and the data display instruction d is not issued, the switching means 101 causes the moving image decoding means 4 to operate.
720p from 720p is selected and output.
When the data display instruction d is issued, the switching means 101
From the mapping means 102 1920 × 108
Converted to 0 video and the mapped video is output.

Next, the moving picture data output from the moving picture mapping means 20 is sent to the moving picture scaling means 12. In the moving image scaling means 12, when the data display instruction d is not issued and the main video and audio are viewed in the data-added TV program, no scaling processing is performed and the moving image output from the moving image mapping means 20. The data is sent to the synthesizing unit 14 as it is, and the synthesizing unit 14 does not similarly perform the synthesizing process.
The moving image input as it is is output as a video from the synthesizing means 14 and sent to the display device. Therefore, when the 720p moving image is sent, the data display instruction d is not issued, and therefore the moving image scaling means 12 and the synthesizing means 14 are executed.
The 720p moving image as it is from the moving image decoding means 4 is sent to, and the 720p moving image is output from the synthesizing means 14 as an image, so that a high quality image can be displayed without deterioration of the image.

When the viewer displays the additional data by the data broadcasting, the control CPU 18 sends the data display instruction data d by pressing the data button on the remote controller 19 or the like. Video scaling means 1
In 2, when the data display instruction d is sent, the moving image is scaled at a predetermined scaling rate based on the switching control data a, and then the moving image is sent to the moving image / still image switching / synthesizing unit 16 in the synthesizing unit 14. Further, still image data is sent from the memory unit 9 to the still image scaling unit 13, the still image is scaled at a predetermined scaling rate based on the switching control data a, and then the still image is stored as a moving image still image in the synthesizing unit 14. It is sent to the switching composition means 16. Further, the character / graphic data is sent from the memory unit 9 to the character / graphic synthesizing means 17 in the synthesizing means 14.

In the switching area generating means 15 in the synthesizing means 14, the switching control data a from the switching control data extracting means 8 is used.
A switching area between a moving image and a still image is generated based on. For example,
As shown in FIG. 8, a switching area is generated such that switching is performed in a rectangular area on the screen. Next, the moving image / still image switching / combining unit 16 selects and switches the moving image / still image from inside / outside of the moving image / still image switching region generated by the switching region generating unit 15 to switch between the moving image / still image. The composite image is sent to the character / graphic composition means 17. The character / graphic synthesizing means 17 performs α-blend synthesis of the composite image of the moving image / still image and the character / graphic. Then, the video in which the moving image, the still image, and the character and graphic are combined is sent to the display device and displayed.

From the above, in the resolution discrimination means 10,
Data indicating the image size of the moving image is detected, and it is determined whether or not the resolution is such that the moving image is mapped. Based on the determination result, when the moving image mapping unit 20 displays only the normal image, the moving image of the moving image is displayed. Since the moving picture from the moving picture decoding means 4 is directly output as an image without mapping, the moving picture in the data-added TV program can be outputted to the display device without deteriorating, and a high image quality like 720p. In the case of the image, the received moving image can be displayed without deterioration in image quality.

In the first embodiment, the resolution determining means 10 detects from the image size in the sequence header from the moving picture decoding means 4 whether the resolution corresponds to the moving picture mapping. Did T
It suffices if the resolution of the moving image transmitted from the data included in S can be detected. For example, the program arrangement information (Service Information) separated from the packet separation means 3 is used.
cation, SI) and the like can be used to obtain the same effect. In other words, in the above SI, the channel name of the service, the title and start / end time of each program, the content, and the type of the components that make up the program (image size of video,
Data indicating information such as the aspect ratio is transmitted as a TS packet, and can be discriminated by this.

In the first embodiment, when the viewer displays additional data by data broadcasting, the control CPU 18 sends the data display instruction data d by pressing the data button on the remote controller 19 or the like. As described above, the data display instruction d sent to the moving picture mapping means 20 may be a priority instruction for main video or data broadcast display which can be preset by the viewer. For example, if the display of the main video is prioritized, the data display instruction d to the video mapping means 20 is not issued, but the output of the video decoder 4 is selected by the switching means 101, and the video mapping is performed when the data broadcast display is prioritized. If the data display instruction d is given to the means 20 and the output of the mapping means 102 is selected, the same effect as that of the first embodiment can be obtained.

Embodiment 2. In the first embodiment, the resolution determining unit 10 detects the image size information in the sequence header from the moving image decoder unit 4, and the detected image size matches the predetermined image size according to the moving image plane resolution. Although it is described that it is determined whether or not it is present, the data control resolution extracted by the switching control data extraction means 8 and the moving image resolution of the TV program with received data can be compared and determined.

FIG. 3 is a block diagram showing an example of the configuration of a digital broadcast receiver according to another embodiment of the present invention. In the figure, 1 to 9 and 12 to 19 are the same as those in the first embodiment shown in FIG. Reference numeral 30 denotes a resolution detecting unit that detects the resolution of the moving image and outputs information indicating the detected resolution. Reference numeral 31 compares the resolution of the moving image data with the resolution indicated by the data broadcasting resolution of the switching control data a, and the resolutions match. The comparing means 21 outputs the comparison result f2 as the discrimination data indicating the non-coincidence, and 21 is the moving picture mapping means which operates based on the result from the comparing means 31.

Next, the operation will be described. The data addition T
The V program is received, and the packet separation means 3 selects from among the TS,
The operation of separating and extracting the packet of the selected program and decoding the packet of the moving image, the encoded data of the audio, the still image, and the character graphic, and the display for the data broadcast in the switching control data extracting means 8, The data indicating the data resolution, the scaling information, and the data indicating the switching area of the moving image / still image are extracted from the packet of data related to the switching control, and the switching control data a for data broadcasting is extracted.
Since the operation up to the output as is the same as the operation in FIG. 1 in the above-described first embodiment, detailed description thereof will be omitted. Therefore, hereinafter, the operations of the resolution detecting means 30, the comparing means 31, and the moving image mapping means 21 will be mainly described.

The moving picture decoding means 4 decodes the coded data of the moving picture and outputs the moving picture data. At the time of decoding, the data of the sequence header in the coded data is sent to the resolution detecting means 30. Resolution detecting means 30
Is the image size (Verit
ical size, Horizonal size
e) and aspect ratio (Aspect Ratio) information is detected, and the image size and aspect ratio in the horizontal and vertical directions are compared as the resolution of the detected moving image data.
Send to 1. The comparing means 31 compares the resolution of the moving image data detected by the resolution detecting means 30 with the data broadcast resolution sent by the switching control data a from the switching control data extracting means 8.

Regarding the data broadcasting resolution transmitted by the switching control data a from the switching control data extracting means 8,
As shown in FIG. 6, a combination of resolutions in each plane of a moving image, a still image, and a character graphic that can be used simultaneously is defined. Therefore, the resolution of the moving picture plane used can be determined from the data broadcast resolution sent by the switching control data a. Therefore, the comparison means 31 obtains the image size and aspect ratio in the horizontal and vertical directions as the resolution of the moving picture plane from the data broadcast resolution by the switching control data a, compares it with the resolution from the resolution detection means 30, and outputs the comparison result. To do.

For example, the moving picture plane resolution at the data broadcasting resolution by the switching control data a and the resolution detecting means 30.
, The comparison result f2 = “0” is output, and the resolution of the moving image is converted to correspond to the mapping resolution. The comparison result f2 = "1" is output. When a TV program is transmitted as a 720P moving image, the resolution detected by the resolution detecting means 30 is 1280.
X720 (16: 9), and the data broadcast resolution by the switching control data a is 960x540 (16: 9), so the detected resolution and 1980x1080 (16: 9).
The comparison result f2 becomes "1" as compared with the moving picture plane resolution of 9).

Although it has been described that the comparison result f2 outputs a value of "1" or "0", it is not limited to this value, and the comparison result shows whether or not resolution mapping is performed. A signal may be output.

The moving picture data decoded by the moving picture decoding means 4 and the comparison result f2 from the comparing means 31 are sent to the moving picture mapping means 21. FIG. 4 is a block diagram showing an example of the configuration of the moving picture mapping means 21, in which 101 and 102 are the same as those in the moving picture mapping means 20 shown in FIG. 2 in the first embodiment.

The moving picture data input from the moving picture decoding means 4 to the moving picture mapping means 21 is sent to the switching means 101 and the mapping means 102. The mapping means 102 converts the resolution into the corresponding moving picture plane based on the data broadcast resolution sent by the switching control data a from the switching control data extracting means 8 and performs mapping. In the case of the 720p moving image, pixel conversion is performed in the horizontal and vertical directions into a 1920 × 1080 moving image, and the moving image is mapped. If the resolutions match, the resolutions can be presented on the moving image plane of the same size without conversion, and the moving image data of the same size is output.
The moving image output from the mapping unit 102 is sent to the switching unit 101.

The switching means 101 switches between the moving picture from the moving picture decoding means 4 and the moving picture data outputted from the mapping means 102 according to the comparison result f2 from the comparing means 31 and the data display instruction d. That is, when the comparison result f2 indicates "1" and the data display instruction d is not issued, the moving image from the moving image decoding means 4 is selected and output. If there is a data display instruction d, mapping means 1
The video data output from 02 is output. On the other hand, when the comparison result f2 indicates “0”, the mapping means 102
Since the conversion is not performed even in, the switching means 10
In either case, either input may be output, but for example, the moving image data output from the mapping unit 102 is selected and output regardless of the data display instruction d.

Therefore, when a 720p moving image is sent in the data-added TV program and the data display instruction d is not issued, the switching means 101 causes the moving image decoding means 4 to operate.
720p from 720p is selected and output.
When the data display instruction d is issued, the switching means 101
From the mapping means 102 1920 × 108
Converted to 0 video and the mapped video is output.

Next, the moving picture data output from the moving picture mapping means 21 is sent to the moving picture scaling means 12. In the moving image scaling means 12, when the data display instruction d is not issued and the main video and audio are viewed in the data-added TV program, no scaling processing is performed and the moving image output from the moving image mapping means 21. The data is sent to the synthesizing unit 14 as it is, and the synthesizing unit 14 does not similarly perform the synthesizing process.
The moving image input as it is is output as a video from the synthesizing means 14 and sent to the display device. Therefore, at this time, 720
When the moving picture of p is sent, since the data display instruction d is not issued, the moving picture of the 720p is sent from the moving picture decoding means 4 to the moving picture scaling means 12 and the combining means 14, and the 720p moving picture is combined. Since it is output as a video from the means 14, it is possible to display a high quality video without deterioration of the image.

Note that, hereinafter, the operation when the viewer displays the additional data by the data broadcast is the same as that in the above-mentioned first embodiment, and the description thereof will be omitted.

From the above, in the resolution detecting means 30,
The data indicating the image size and aspect ratio of the moving image in the TV program with received data is detected, and the comparison means 31
The detected resolution of the moving image is compared with the resolution based on the data broadcasting resolution of the switching control data a to determine whether or not the moving image is to be mapped, and based on the result, the moving image mapping unit 21 determines the normal resolution. If only the video is displayed, the video is not mapped and the video from the video decoding means 4 is output as the video as it is, so the video is output to the display device without impairing the image quality of the video in the data-added TV program. In the case of a high quality image such as 720p, the received moving image can be displayed without deterioration in image quality.

Further, the resolution based on the switching control data for data broadcasting extracted by the switching control data extracting means 8 and the resolution of the detected moving image are compared to determine whether they match or not, so that the resolution of the received moving image , Even if there are provisions that can be presented in multiple video plane resolutions, the resolution of the video is converted and the data broadcast resolution based on the switching control data for the received data broadcast that is the resolution of the video to be mapped Can be judged from.

In the second embodiment, the resolution detecting means 30 detects the resolution of the moving picture from the image size and aspect ratio in the sequence header from the moving picture decoding means 4, but in the received TS. It only needs to be able to detect the resolution of the video sent from the data included,
For example, the same effect can be obtained by using the program arrangement information (Service Information, referred to as SI) separated from the packet separating unit 3. That is, in the above SI, data indicating the information such as the channel name of the service, the title and start / end time of each program, the content, and the type of the components (video image size, aspect ratio, etc.) that compose the program are stored in the TS packet. It is sent as, and can be identified by this.

In the second embodiment, when the viewer displays the additional data by the data broadcast, the control CPU 18 sends the data display instruction data d by pressing the data button on the remote controller 19 or the like. As described above, the data display instruction d sent to the moving picture mapping means 21 may be a priority instruction for main video or data broadcast display which can be preset by the viewer. For example, if the display of the main video is prioritized, the data display instruction d to the video mapping means 21 is not issued, but the output of the video decoder 4 is selected by the switching means 101, and the video mapping is performed when the data broadcast display is prioritized. The data display instruction d to the means 21 may be given and the output of the mapping means 102 may be selected.

The digital broadcast receivers of the above-mentioned first and second embodiments extract the data for controlling the display and switching of the data broadcast from the packet of the additional data, and output the switching control data to the switching control data extracting means. 8, a control CPU 18 for outputting a data display instruction d for instructing whether or not to display additional data, a moving picture decoding means 4 for decoding encoded packets of a moving picture, and a resolution of a moving picture from a multiple stream. A resolution determination unit 10 for detecting and determining a match or mismatch with the resolution that can be presented and outputting the determination data f1 and the comparison result f2 indicating the determination result, the resolution detection unit 30, the comparison unit 31, and the data display instruction d. On the basis of the discrimination data f1 and the comparison result f2, the moving picture data output from the moving picture decoding means 4 is directly reproduced. By providing a video mapping means 20, 21 for converting into a predetermined resolution by the switching control data a, it can be displayed without degrading the picture quality in high-quality image.

The resolution discriminating means 10 discriminates whether or not the resolutions of the moving images are matched by using the resolutions of the moving images which are defined in advance for data broadcasting as the resolutions that can be presented, so that quick discrimination can be performed. Become.

Further, the resolution discriminating means 10 detects the image size in the horizontal and vertical directions of the moving picture by the data of the header portion in the moving picture data outputted from the moving picture decoding means 20 as the detection of the resolution of the moving picture.
It is possible to determine from the received data whether or not the resolution is such that a moving image is mapped.

Further, the resolution detecting means 30 which detects the resolution of the moving image from the multiplex stream and outputs the resolution of the moving image data is compared with the resolution of the moving image data and the resolution of the moving image indicated by the data broadcasting resolution of the switching control data a. Then
By including the comparison means 31 that outputs the comparison result f2 as the determination data indicating whether the resolutions match or not, the resolutions of the moving images are converted even when the provisions that can be presented to a plurality of moving image plane resolutions are made. Whether or not the resolution of the moving image to be mapped can be determined from the data broadcasting resolution based on the received switching control data for data broadcasting.

Furthermore, the resolution detecting means 30 detects the resolution indicated by the horizontal and vertical image sizes and aspect ratio of the moving image from the data of the header portion in the moving image data output from the moving image decoding means 4. The resolution of the moving image can be detected accurately.

Also, the moving picture mapping means 20 and 21.
However, based on the data broadcast resolution transmitted by the switching control data a, the mapping means 102 for converting the moving picture data into the resolution of the corresponding moving picture plane, the discrimination data f1, the comparison result f2 and the data display instruction d, the moving picture decoding means 4 By having the switching means 101 for switching the moving picture data from the above and the moving picture data output from the mapping means 102, it is possible to select whether or not to change the resolution according to the discrimination data f1 and f2 and the data display instruction d. I can.

Further, the switching means 101 causes the discrimination data f
1 and the comparison result f2 indicate disagreement, and when the data display instruction d indicates that data display is not performed, the moving picture data is output from the moving picture decoding means 4 to change the resolution when there is no data display. Can be displayed without performing.

[0067]

As described above, the digital broadcast receiver according to the present invention detects the resolution of a moving image from a multiplex stream, determines whether the resolution matches the presentable resolution, and determines the determination result as determination data indicating the determination result. Based on the resolution determining means for outputting, the data display instruction and the data display instruction, it is selected whether or not the moving picture data from the moving picture decoding means is converted to a predetermined resolution from the switching control data, and the moving picture from the moving picture decoding means is selected. Since the data is provided as it is or with the conversion means for converting and outputting the resolution, it is possible to display the high quality image without degrading the image quality.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of a configuration of a digital broadcast receiver according to Embodiment 1 of the present invention.

FIG. 2 is a block diagram showing a configuration example of a moving image mapping means in the digital broadcast receiver according to the first embodiment of the present invention.

FIG. 3 is a block diagram showing an example of a configuration of a digital broadcast receiver according to Embodiment 2 of the present invention.

FIG. 4 is a block diagram showing a configuration example of a moving image mapping means in a digital broadcast receiver according to a second embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration example of a conventional digital broadcast receiver.

FIG. 6 BS in BS digital broadcasting system standard
It is a figure which shows the combination of the resolution of each plane of the moving image, the still image, and the character figure in the data broadcasting resolution by the digital broadcasting operation regulation.

FIG. 7: BS in BS digital broadcasting system standard
It is a figure which shows the video plane resolution which can be presented with respect to the resolution of the video data based on the digital broadcasting operation regulation.

FIG. 8 is a diagram showing an example of a display area when a moving image and a still image are combined.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 tuner, 2 demodulation means, 3 packet separation means, 4 moving picture decoding means, 5 audio decoding means, 6 still picture decoding means, 7 character figure decoding means, 8 switching control data extraction means, 9 memory section, 10 resolution determination means, 12 moving image scaling means, 13 still image scaling means, 14 synthesizing means, 15 switching area generating means, 16 moving image still image switching area synthesizing means, 17 character / graphic synthesizing means, 1
8 control CPU, 19 remote controller, 20 moving picture mapping means, 21 moving picture mapping means, 30 resolution detecting means, 31 comparing means, 101 switching means,
102 Mapping means.

Continued front page    F-term (reference) 5C025 BA01 BA18 BA25 BA30 DA01                       DA05 DA10                 5C063 AB03 AB05 BA03 CA01 CA12                       CA23 DA01 DA02 DA03 DA05                       DA07                 5K028 AA01 BB04 DD02 EE03 KK03                       KK32

Claims (7)

[Claims] 1. A digital broadcast receiver for receiving and processing a program in which, in digital broadcasting for data broadcasting, mainly video and audio, and additional data is broadcast along with video and audio, and a multiplex stream which is a digital broadcast signal. Packet separation means for extracting encoded packets of moving images, audio, and additional data related to the program from the above, and data for controlling display and switching of the data broadcast from the above additional data packets, and switching control Switching control data extraction means for outputting data, control means for outputting a data display instruction for instructing whether or not to display the additional data, and moving image decoding means for decoding the encoded packet of the moving image. , The resolution of the video is detected from the above multiple streams, and the match and mismatch with the resolution that can be presented are detected. Separately, based on the resolution discrimination means for outputting discrimination data indicating the discrimination result and the data display instruction and the discrimination data, the moving picture data from the moving picture decoding means is converted to a predetermined resolution by the switching control data. A digital broadcast receiver, comprising: a conversion unit for selecting whether or not to output the moving image data from the moving image decoding unit as it is or after converting the resolution. 2. The digital broadcast receiver according to claim 1, wherein the resolution discriminating means uses a resolution of a moving image defined in advance for data broadcasting as the presentable resolution. 3. The resolution determining means detects the image size in the horizontal and vertical directions of the moving image based on the data of the header portion in the moving image data output from the moving image decoding means, as the detection of the resolution of the moving image. The digital broadcast receiver according to claim 1 or 2. 4. The resolution determining means detects the resolution of a moving image from the multiplex stream and outputs the resolution of the moving image data, and the resolution of the moving image data and the data broadcast resolution of the switching control data. Compare the resolution of the video shown,
The digital broadcast receiver according to claim 1, further comprising: a comparison unit that outputs a comparison result as the determination data indicating whether the resolutions match or not. 5. The resolution detecting means detects the resolution indicated by the image size and aspect ratio in the horizontal and vertical directions of the moving image based on the data of the header portion in the moving image data output from the moving image decoding means. The digital broadcast receiver according to claim 4. 6. The mapping means converts the moving picture data into the resolution of a corresponding moving picture plane based on the data broadcast resolution sent by the switching control data, and the discrimination data and the data display instruction. 6. The digital broadcast receiver according to claim 1, further comprising a switching unit that switches between the moving image data from the moving image decoding unit and the moving image data output from the mapping unit. 7. The switching means outputs the moving picture data from the moving picture decoding means when the discrimination data indicates a mismatch and the data display instruction indicates that no data is displayed. The digital broadcast receiver according to claim 6.