JP2008278114A - Digital broadcasting receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital broadcasting receiver capable of realizing a screen saver function, while dispensing with the provision of image data for a screen saver, and using a memory region to be used for image data for the screen saver for another purpose of use, and for saving memory. <P>SOLUTION: A DTV module 5 separates video data and closed caption data from a transport stream extracted from a digital broadcast signal, and decodes each of them, and generates an analog video signal, based on decoded video data and closed caption data, and outputs it via a DVD block 6 to an external television; and when the same picture is displayed in a predetermined time on television, the DTV module 5 receives a screen saver start request from the DVD block 6, decodes the predetermined closed caption data, and generates an analog video signal for a screen saver based on the decoded predetermined closed caption data, and outputs it via a DVD block 6 to an external television. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a digital broadcast receiving apparatus.

Recently, DVD recorders compatible with digital broadcast reception have become widespread, and some DVD recorders having a screen saver function have appeared. A DVD recorder having such a screen saver function outputs a video signal for a screen saver to a television when the same screen is displayed for a predetermined time on a television connected to the DVD recorder, thereby preventing screen burn-in of the television. .
Japanese Patent Laid-Open No. 2005-27112

  However, the conventional DVD recorder having the screen saver function has a problem that image data for the screen saver needs to be stored in the memory in advance, and the memory is consumed greatly.

  In Patent Document 1, when a pause key or stop key is pressed on a remote controller for VCR during playback of a VCR which is a connected external device, the pause key signal or stop key signal is received and then the remote controller for a certain time. There has been disclosed a television that displays a screen saver image on the CRT display unit when the play key is not operated, but this television also stores screen saver image data in a memory in advance. There is a need.

  In view of the above problems, the present invention realizes a screen saver function while eliminating the need for screen saver image data, and the memory area used for the screen saver image data can be used for another purpose or saves memory. An object of the present invention is to provide a digital broadcast receiving apparatus capable of performing the above.

In order to achieve the above object, a digital broadcast receiving apparatus of the present invention extracts a transport stream from a digital broadcast signal and outputs it, and outputs video data and closed caption data from the output transport stream. A video signal output unit for separating and decoding the separated video data and closed caption data, generating a video signal based on the decoded video data and closed caption data, and outputting the generated video signal;
The video signal output unit decodes predetermined closed caption data stored in advance in the video signal output unit, generates a video signal for a screen saver based on the decoded predetermined closed caption data, and generates the generated video signal Is output.

  According to such a configuration, the screen saver function is realized while eliminating the image data for the screen saver, and the memory area used for the image data for the screen saver can be used for another purpose or the memory can be saved. Can do.

In the digital broadcast receiving apparatus according to the present invention, in the above configuration, the video signal output unit generates the video signal based on the decoded video data, closed caption data, and setting data relating to a display color at the time of character display. And
The video signal output unit preferably generates a video signal for the screen saver based on the decoded predetermined closed caption data and the setting data.

  According to such a configuration, since the screen saver video signal is generated by diverting the setting data related to the display color for character display in the broadcast video, another display color data for generating the screen saver video signal. Is no longer necessary.

  Further, in the digital broadcast receiving apparatus of the present invention, for example, in the above configuration, the setting data relating to the display color at the time of the character display is composed of data representing the color of the display character itself and data representing the background color of the display character, The video signal output unit is for video display such that characters of the color represented by the data representing the color of the display character scroll on the entire screen, which is the color represented by the data representing the background color of the display character. It may be configured to generate a video signal for a screen saver.

  The digital broadcast receiving apparatus according to the present invention may be configured such that setting data relating to a display color at the time of character display is set in accordance with an operation on an operation means. Thereby, the screen saver screen can be displayed in a color desired by the user.

  According to the digital broadcast receiving apparatus of the present invention, the screen saver function is realized while the image data for the screen saver is unnecessary, and the memory area used for the image data for the screen saver can be used for another purpose or the memory can be saved. Can be.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a schematic configuration diagram of a DVD recorder according to the present invention. As shown in the figure, the DVD recorder according to the present invention includes a tuner 2, a digital demodulator 3, an error corrector 4, a DTV (Digital Television) module 5, and a DVD block 6. An antenna 1 is connected to the tuner 2, and a television (not shown) is connected to the D / A converter 6 d of the DVD block 6.

  The DTV module 5 includes a data separation unit 5a, a video decoding unit 5b, a closed caption decoding unit (hereinafter referred to as CC decoding unit) 5c, an analog video signal generation unit 5d, a control unit 5e, and a storage unit 5f. Is done. The DVD block 6 includes an A / D conversion unit 6a, a video compression / decompression unit 6b, a DVD recording / playback unit 6c, a D / A conversion unit 6d, a control unit 6e, and a remote control reception unit 6f. The

  The antenna 1 receives a broadcast wave of a digital broadcast, converts the broadcast wave into a high frequency signal, and outputs it to the tuner 2. The tuner 2 extracts a high-frequency signal having a desired frequency from the high-frequency signal input from the antenna 1, converts the frequency of the extracted high-frequency signal to generate an intermediate frequency signal, and converts the generated intermediate frequency signal into a digital demodulation unit 3 is output. The digital demodulation unit 3 performs digital demodulation on the intermediate frequency signal input from the tuner 2 and outputs a transport stream to the error correction unit 4. The error correction unit 4 performs error correction on the transport stream input from the digital demodulation unit 3, and outputs the error-corrected transport stream to the data separation unit 5 a of the DTV module 5.

  The data separation unit 5a separates the video data and the closed caption data from the transport stream input from the error correction unit 4, outputs the separated video data to the video decoding unit 5b, and outputs the separated closed caption data to the CC. It outputs to the decoding part 5c. The video decoder 5b decodes the video data input from the data separator 5a, and outputs the decoded video data to the analog video signal generator 5d. The CC decoding unit 5c decodes the closed caption data input from the data separation unit 5a, and outputs the decoded closed caption data to the analog video signal generation unit 5d. Then, the analog video signal generation unit 5d receives the video data input from the video decoding unit 5b, the closed caption data input from the CC decoding unit 5c, and the character display color read by the control unit 5e from the storage unit 5f. An analog video signal is generated based on the setting data and output to the DVD block 6.

  Here, the character display color setting data is composed of data representing the color of the display character itself and data representing the background color of the display character, and is initially set and stored in the storage unit 5f of the DTV module 5 at the time of factory shipment. The control unit 6e of the DVD block 6 receives a code signal from the remote control receiving unit 6f by a setting menu display operation on a remote controller (not shown), generates an OSD image for the setting menu, and D / A converts the generated OSD image. When output to a television (not shown) via the unit 6d, a setting menu including setting items for the color of the display character itself and the background color of the display character is displayed on the television. Here, when a desired color is selected for each setting item by the remote controller operation and the remote controller is determined, the character display color setting data in the storage unit 5f is the character display color setting corresponding to the selected color. Updated to data.

  The DVD block 6 outputs the analog video signal input from the analog video signal generation unit 5d of the DTV module 5 to a television (not shown). Thereby, the broadcast video is displayed on the television. At this time, characters are also displayed on the television, and the characters are displayed with characters and backgrounds of colors according to the character display color setting data. As described above, the character display color setting data is operated by remote control operation. When is updated, characters are displayed in a color desired by the user.

  FIG. 3 shows a screen image when a broadcast video is displayed on a television. For example, when the data representing the color of the display character itself constituting the character display color setting data represents red and the data representing the background color of the display character constituting the character display color setting data represents blue, FIG. The characters “What is This?” Shown in FIG. 3 are displayed in red, and the black background of the characters shown in FIG. 3 is displayed in blue.

  The analog video signal generated and output by the analog video signal generator 5d of the DTV module 5 is input to the A / D converter 6a, and the analog video signal input by the A / D converter 6a is A / D converted. The digital video signal is output to the video compression / decompression unit 6b. The video compression / decompression unit 6b compresses the digital video signal input from the A / D conversion unit 6a, outputs the compressed digital video signal to the DVD recording / reproducing unit 6c, and the DVD recording / reproducing unit 6c compresses the digital video signal. Is recorded on a DVD. Thereby, the broadcast video is recorded on the DVD.

  The DVD recording / reproducing unit 6c reproduces the digital video signal compressed from the DVD, and the video compression / decompression unit 6b decompresses the compressed digital video signal and D / A converts the decompressed digital video signal. To the unit 6d. The D / A conversion unit 6d D / A converts the digital video signal input from the video compression / decompression unit 6b and outputs an analog video signal to a television (not shown). As a result, the reproduced video is displayed on the television.

  Next, the screen saver function of the DVD recorder according to the present invention will be described with reference to the flowchart shown in FIG.

  When there is no operation of the remote controller (not shown) for a predetermined time while the DVD recorder is stopped, or when the DVD playback pause state continues for a predetermined time, the same screen is continuously displayed on the television (not shown) for a predetermined time. If it is, the control unit 6e of the DVD block 6 requests the control unit 5e of the DTV module 5 to start a screen saver (step S11).

  When the control unit 5e of the DTV module 5 receives the screen saver activation request from the control unit 6e of the DVD block 6 (step S21), the control unit 5e of the DTV module 5 stores a predetermined closed caption stored in advance in the storage unit 5f. The data is read and transmitted to the CC decoding unit 5c, and the CC decoding unit 5c decodes predetermined closed caption data. Then, the analog video signal generation unit 5d generates an analog video signal for screen saver based on the decoded predetermined closed caption data and the character display color setting data read from the storage unit 5f by the control unit 5e, thereby generating a DVD block. 6 (step S22).

  Here, for example, the color represented by the data representing the color of the display character itself constituting the character display color setting data is displayed on the entire screen, which is the color represented by the data representing the background color of the display character constituting the character display color setting data. An analog video signal for video display in which characters are scrolled is generated. In this way, the character display color setting data for character display in the broadcast video is used to generate the analog video signal for the screen saver, so there is no need for separate display color data for generating the analog video signal for the screen saver. It becomes.

  Then, the DVD block 6 through-outputs an analog video signal for screen saver input from the analog video signal generation unit 5d of the DTV module 5 to a television (not shown) (step S12). Thereby, a screen saver screen is displayed on the television.

  FIG. 4 shows an example of a screen saver screen display in a television. This is an example of a screen when an analog video signal for video display in which the above-described characters scroll is generated. First, as shown in the upper left of FIG. 4, the characters “Screen Save” are displayed at the bottom of the screen. At this time, for example, when the data representing the color of the display character itself constituting the character display color setting data represents red, the character “Screen Save” is displayed in red, and the display character constituting the character display color setting data 4 represents blue, the black background of the entire screen shown in FIG. 4 is displayed in blue. Then, the screen changes in the order of the arrows in FIG. 4 with the passage of time, and the characters “Screen Save” scroll upward on the screen. As described above, when the character display color setting data is updated by a remote control operation, the screen saver screen is displayed in a color desired by the user.

  As described above, according to the DVD recorder of the present invention, the screen saver function is realized while the image data for the screen saver is unnecessary, and the memory area used for the image data for the screen saver is used for another purpose, or the memory is used. You can save.

  In the above embodiment, the DVD recorder has been described as an example. However, the present invention is not limited to this, and can be applied to a digital television, a digital tuner, and the like.

These are the schematic block diagrams of the DVD recorder which concerns on this invention. These are the flowcharts regarding screen saver starting in the DVD recorder which concerns on this invention. These are figures which show the screen image at the time of the broadcast video display in a television. These are figures which show an example of the screen saver screen display in a television.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Antenna 2 Tuner 3 Digital demodulation part 4 Error correction part 5 DTV module 5a Data separation part 5b Video decoding part 5c Closed caption decoding part 5d Analog video signal generation part 5e Control part 5f Storage part 6 DVD block 6a A / D conversion part 6b Video compression / decompression unit 6c DVD recording / playback unit 6d D / A conversion unit 6e Control unit 6f Remote control reception unit

Claims (4)

A transport stream output unit that extracts and outputs a transport stream from a digital broadcast signal; and separates video data and closed caption data from the output transport stream, decodes the separated video data and closed caption data, and A video signal output unit that generates a video signal based on the decoded video data and the closed caption data and outputs the generated video signal;
The video signal output unit decodes predetermined closed caption data stored in advance in the video signal output unit, generates a video signal for a screen saver based on the decoded predetermined closed caption data, and generates the generated video signal. A digital broadcast receiver characterized in that The video signal output unit generates the video signal based on the decoded video data, closed caption data, and setting data relating to a display color at the time of character display,
The digital broadcast receiving apparatus according to claim 1, wherein the video signal output unit generates a video signal for the screen saver based on the decoded predetermined closed caption data and the setting data. The setting data relating to the display color at the time of the character display is composed of data representing the color of the display character itself and data representing the background color of the display character, and the video signal output unit is data representing the background color of the display character. 3. A video signal for a screen saver for generating a video image in which a character of a color represented by data representing a color of the display character itself is scrolled on the entire screen which is a color represented by the display character. The digital broadcast receiver described in 1. 4. The digital broadcast receiving apparatus according to claim 2, wherein setting data relating to a display color at the time of character display is set according to an operation on an operation unit.