KR100310044B1 - Digital tv for inserting caption data and v-chip data in converting digital broadcasting signal into ntsc signal - Google Patents

Abstract

PURPOSE: A digital television is provided to perform caption and V-chip function on the screen by adding caption data and V-chip data in converting digital broadcasting signals into NTSC(National Television System Committee) signals. CONSTITUTION: A digital television is composed of a control unit(10) controlling the digital television, outputting by reading caption data and V-chip data among digital signals, and inserting the caption data and the V-chip data to NTSC signals; a format converting unit(15) inputting video signals by the control unit, and outputting by converting into the NTSC signals; and a switch unit(16) outputting by inserting the caption data and the V-chip data from the control unit to the predetermined portion of the NTSC signals converted from the format converting unit with switching by control unit. The image including the caption and V-chip function is displayed with inserting caption data and V-chip data in converting the digital signal into the NTSC signal.

Description

Imaging device to insert caption data and V-chip data when converting digital broadcasting signal into NTSC signal

The present invention relates to a video apparatus (digital TV receiver) having a function capable of converting a received digital broadcast signal into an NTSC signal. More particularly, the present invention relates to caption data when converting a digital broadcast signal into an NTSC signal. The present invention relates to an imaging apparatus capable of inserting V-chip data into an NTSC signal.

The control unit for controlling the digital TV receiver generally reads the caption data and the V-chip data included in the received digital broadcasting signal to process the caption function and the V-chip function. When the digital TV receiver generates and outputs an NTSC signal, the digital TV receiver converts the received digital broadcast signal into an NTSC signal and outputs the NTSC signal. In this case, the NTSC signal is a video signal without caption data and V-chip data. Thus, an image without a caption function and a V-chip function is displayed on the screen.

Accordingly, an aspect of the present invention is to provide a video device capable of performing a caption function and a V-chip function by inserting caption data and V-chip data into an NTSC signal when converting a received digital broadcasting signal into an NTSC signal.

1 is a block diagram showing a schematic configuration of a first digital TV receiver according to the present invention;

2 is a block diagram showing a schematic configuration of a second digital TV receiver according to the present invention;

<Description of main parts of drawing>

15, 21: first and second format conversion unit 10, 20: first and second control unit

16 switch unit

A feature of the present invention for achieving the above object is a video device having a function capable of converting a received digital broadcast signal into an NTSC signal, controlling the video device and caption data and V-chip of the digital broadcast signal. (V-chip) reads and outputs the data and controls the caption data and V-chip data to be inserted at a specific position of the converted NTSC signal, and receives the video signal among the digital broadcasting signals and converts it into the NTSC signal under the control of the control unit. And a switch unit for inserting and outputting the caption data and the V-chip data from the control unit at a predetermined position of the NTSC signal converted by the format conversion unit. In NTSC signal conversion, caption data and V-chip data are inserted into an image device.

Another aspect of the present invention for achieving the above object is in a video device having a function capable of converting a received digital broadcast signal into an NTSC signal, controlling the video device, and the caption data and V-chip data of the digital broadcast signal A control unit for reading out and outputting the caption data and the V-chip data to be inserted at a predetermined position of the converted NTSC signal, and converting the video signal from the digital broadcasting signal into an NTSC signal, and controlling the control unit according to the control of the control unit. It is provided with a format conversion unit for inserting the caption data and V-chip data from the converted NTSC signal into a predetermined position and outputting the caption data and the V-chip data when the digital broadcasting signal is converted into an NTSC signal. .

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram showing a schematic configuration of a first digital TV receiver according to the present invention.

The first digital TV receiver includes a tuner 11 for receiving a digital broadcast signal through an antenna and outputting an IF signal, and an IF processor 12 and an IF processor for performing baseband processing on the IF signal output from the tuner 11. 12) The video signal, the audio signal and the additional signal are separated from the digital signal output from the channel decoder 13 and the channel decoder 13, which detects an error with respect to the signal output from 12) and corrects the error upon detection. It is provided with a TS (Transport Stream) decoder 14 for decoding and outputting respective signals. Since the configuration and the functions of the above-described components are well-known techniques already used, a detailed description thereof will be omitted below. At the output end of the TS decoder 14, the decoded video signal output from the TS decoder 14 is converted into a display type described in advance and output as a digital signal (D-TV signal), and the video signal is converted into an NTSC signal. In this case, the first format converter 15 for converting an input video signal into an analog signal (NTSC signal) and outputting the signal is connected. The first controller 10 controls the first digital TV receiver as a whole and reads caption data and V-chip data, which are additional signals separated and decoded from the TS decoder 14, to read the caption data and the V-chip data. Output in the form that can be inserted in the specified position of the NTSC signal output from.

Output signals (caption data and V-chip data) output from the first controller 10 are output from the first format converter 15 to the output terminals of the first controller 10 and the first format converter 15. A switch section 16 for switching additional signals for insertion into a prescribed position of the NTSC signal is connected, and the selection operation of this switch section 16 is controlled by the first control section 10.

The operation of converting the NTSC signal of the first digital TV receiver configured as described above will be described in more detail.

The digital broadcast signal received through the antenna is tuned by the tuner 11 and then input to the IF processor 12. The IF processor 12 performs baseband processing on the IF signal received through the tuner 11 and outputs the result to the channel decoder 13. The channel decoder 13 receives an output signal from the IF processor 12 and detects and corrects an error, and outputs the result to the TS decoder 14. The TS decoder 14 decodes the signal received from the channel decoder 13 into a video signal, an audio signal, and an additional signal, decodes the signal, and outputs the video signal to the first format converter 15. The V-chip data is output to the first control unit 10. At this time, the operation of the first digital TV receiver according to the present invention can be divided into an operation of converting a largely received digital broadcast signal into an NTSC signal and an operation of processing a digital signal received as a general digital TV receiver and displaying it on a screen. Can be. When the first digital TV receiver performs NTSC signal conversion, the first format converter 15 converts the video signal received from the TS decoder 14 into an NTSC signal and outputs the NTSC signal to the switch unit 16. The first control unit 10 outputs the caption data and the V-chip data received from the TS decoder 14 to the switch unit 16, and the switch unit 16 from the first control unit 10 in the prescribed order. The caption data and the V-chip data are controlled to be switched so that the caption data and the V-chip data are inserted into the prescribed position of the NTSC signal output from the first format converter 15 so as to be output.

However, when the first digital TV receiver does not perform NTSC signal conversion, the first format conversion unit 15 converts the decoded product signal received from the TS decoder 14 into a preset display type and performs D- It outputs to OSGM not shown as TV signal. The first controller 10 outputs caption data and V-chip data read from the TS decoder 14 to OSGM (On Screen Graphics & Mixer). OSGM (not shown) is to perform the caption function and V-chip function on the screen by using the image signal and caption data and V-chip data received from the first format conversion unit 15 and the first control unit 10 do.

2 is a block diagram showing a schematic configuration of a second digital TV receiver according to the present invention. Components which perform the same functions as those of FIG. 1 among the components of the second digital TV receiver of FIG. 2 are denoted by the same reference numerals and description thereof will be omitted. The second digital TV receiver of FIG. 2 includes a second control unit 20 and a second format conversion unit 21 which perform different functions from those of the first digital TV receiver of FIG. 1. And the function of the second format conversion section will be described later.

The operation of the second digital TV receiver according to the present invention also converts the digital broadcast signal largely received into the NTSC signal as in the first digital TV receiver, and otherwise processes the digital signal received as a general digital TV receiver on the screen. It can be divided into presenting behaviors.

When the second digital TV receiver performs NTSC signal conversion, the second controller 20 outputs caption data and V-chip data read from the TS decoder 14 to the second format converter 21, The second format conversion section 21 controls to insert the caption data and the V-chip data from the second control section 20 at the prescribed position of the converted NTSC signal. The second format converter 21 converts an image signal input from the TS decoder 14 into an NTSC signal, and converts caption data and V-chip data input from the second controller 20 into the second control unit 21. Insert into the specified position of the converted NTSC signal under control. That is, the second format converter 21 outputs an NTSC signal into which caption data and V-chip data are inserted.

When the second digital TV receiver does not perform NTSC signal conversion, the second format converter 21 displays the decoded video signal input from the TS decoder 14 in advance as shown in the first digital TV receiver. Format conversion and output to OSGM not shown as D-TV signal, and second control unit 20 directly converts caption data and V-chip data read from TS decoder 14 to OSGM (On Screen Graphics & Mixer). Output OSGM (not shown) is to perform the caption function and V-chip function on the screen by using the image signal and caption data and V-chip data received from the first format conversion unit 15 and the first control unit 10 do.

As described above, when the received digital broadcasting signal is converted into an NTSC signal, the caption data and the V-chip data are inserted, thereby displaying an image in which the caption function and the V-chip function are performed.

Claims (4)

In a video device having a function of converting a received digital broadcast signal into an NTSC signal, the video device is controlled, and caption data and V-chip data are read out of the digital broadcast signal. A control unit configured to output the caption data and the V-chip data to be inserted at a specific position of the converted NTSC signal; A format conversion unit which receives a video signal of the digital broadcasting signal and converts it into an NTSC signal under the control of the controller; And a switch unit which switches under the control of the controller to insert caption data and V-chip data from the controller into a predetermined position of the NTSC signal converted by the format converter and to output the V-chip data. Imaging device to insert caption data and V-chip data. The method of claim 1, wherein when the video device does not convert the digital broadcasting signal into an NTSC signal, the controller outputs the received caption data and the V-chip data to OSGM (On Screen Graphics & Mixer) and converts the format. And converting the input video signal into a preset display type and outputting the converted video signal to the OSGM as a D-TV signal. A video device having a function of converting a received digital broadcast signal into an NTSC signal, the video device being controlled, the caption data and the V-chip data being read and output from the digital broadcast signal, and the caption data and the V- A controller for controlling chip data to be inserted at a predetermined position of the converted NTSC signal; And converting the video signal from the digital broadcasting signal into an NTSC signal, and inserting caption data and V-chip data from the controller into a predetermined position of the converted NTSC signal under the control of the controller. And a caption data and a V-chip data for converting a digital broadcast signal into an NTSC signal. The method of claim 3, wherein when the video device does not convert the digital broadcasting signal into an NTSC signal, the controller outputs the received caption data and the V-chip data to OSGM (On Screen Graphics & Mixer) and converts the format. And converting the input video signal into a preset display type and outputting the converted video signal to the OSGM as a D-TV signal.