JP2007036923A - Television receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To quickly display data broadcast for the second and subsequent times. <P>SOLUTION: In the television receiver capable of receiving data broadcast, a signal is written in a memory, after it has been decoded to an RGB signal. When the same data broadcast screen is displayed for the second and subsequent times, the data decoded to an RGB signal and stored in a memory is read out and displayed. Since the time for decoding data broadcast to an RGB signal becomes unnecessary, data broadcast can be displayed quickly for the second and subsequent times. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to data broadcasting display of digital broadcasting in a television receiver.

In digital broadcasting such as BS digital and terrestrial digital broadcasting, data broadcasting is one of the attractions with high image quality. Data broadcasting is an attractive feature for users, such as being able to retrieve information they want to know. As an example of a television capable of viewing digital broadcasting and data broadcasting, there is TH-32D60 manufactured by Matsushita Electric Industrial Co., Ltd. Various attempts have also been made to use the data broadcasting conveniently (see, for example, Patent Document 1).
JP-A-10-290438

  However, in the conventional television receiver, when digital signals and data broadcasts are sent in the form of digital data, the digital data is processed and sent in various forms such as data compression and scramble. Therefore, there is a problem that it takes time to display the original video signal and data, and it takes time to display. In particular, data broadcasting has a problem that it takes time to redisplay the contents of the data broadcast once displayed as it is.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described conventional problems, and to provide a television receiver that displays a data broadcast quickly after the second time by writing a signal after being decoded into an RGB signal into a memory. To do.

  In order to solve the above-described conventional problem, the television receiver according to the first aspect of the present invention is a television receiver capable of receiving data broadcasting, and writes the signal after being decoded into RGB signals into a memory. Thus, the second and subsequent times have the effect of quickly displaying the data broadcast.

  A television receiver according to a second aspect of the present invention is a television receiver capable of receiving a data broadcast, converts a digital broadcast signal into an RGB signal, a digital broadcast decoder circuit, and performs image quality improvement and resolution conversion of the RGB signal. A signal processing circuit to perform, a memory control circuit to read and write the output of the signal processing circuit, a memory to write and save the output of the signal processing circuit, an output of the signal processing circuit and a signal read from the memory Selector to select, user I / F to detect that the user wants to display data broadcast, microcomputer to control various circuits and devices, and output of the selector to drive a display device And a display device for finally displaying a television signal. That.

  The television receiver according to a third aspect of the present invention is a television receiver in which the number of bits written to the memory is smaller than the number of bits before writing, in addition to the first aspect, and the memory capacity used is reduced. However, the second and subsequent times have the effect of quickly displaying the data broadcast.

  A television receiver according to a fourth aspect of the present invention is a television receiver further comprising a bit compression circuit between the memory control circuit and the memory in addition to the configuration of the second aspect.

  A television receiver according to a fifth aspect of the present invention includes a user I / F means for displaying past data broadcasts in addition to the user I / F means for displaying current data broadcasts in the second invention. A television receiver.

  The television receiver according to a sixth aspect of the present invention is a television capable of storing a plurality of display screens for past data broadcasting in addition to the fifth aspect and selecting an arbitrary display screen. John receiver.

  According to the present invention, in a television receiver capable of receiving a data broadcast, the television receiver capable of quickly displaying the data broadcast from the second time on by writing the signal after being decoded into the RGB signal into the memory. An apparatus can be provided.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(Embodiment 1)
FIG. 1 is an example of a configuration diagram of a television receiver of the present invention. In FIG. 1, 1 is a digital broadcast decoder that receives a digital broadcast and converts the digital data into an RGB signal or the like for performing the same processing as the terrestrial broadcast. 2 is an image quality of the RGB signal according to user preference. A signal processing circuit that performs improvement and performs resolution conversion in accordance with the display device; 3 is a memory control circuit that reads and writes the output of the signal processing circuit 2; 4 is a memory that writes and stores the output of the signal processing circuit 2; 5 is a selector for selecting the output of the signal processing circuit 2 and the signal read from the memory 4, 6 is a user I / F for detecting that the user wants to display a data broadcast, and 7 is various circuits and devices. 8 is a drive circuit for converting the output of the selector 5 into a signal for driving the display device, and 9 is a television computer. It is a display device for displaying the signal.

  A specific operation will be described below. At the time of normal broadcast video reception, the transmitted radio wave is received and processed by the digital broadcast decoder 1. In digital broadcasting, a video signal is digitized, band-compressed, scrambled, etc., and converted into a digitized RGB signal (or Y color difference signal) similar to terrestrial analog broadcasting by a digital broadcast decoder. The converted RGB signal is subjected to image quality improvement such as peaking correction and contrast correction according to the user's preference in the signal processing circuit 2, and is subjected to resolution conversion according to the display device and output. The output signal is converted by the drive circuit 8 through the selector 5 into a drive signal for driving the display device 9 that finally displays the television signal and displayed.

  Even when data broadcasting is received, the processing in the digital broadcast decoder 1 is changed, and the other processing is the same as that of a normal video signal. At that time, only part of the broadcast data is assigned to the data broadcast, and therefore data must be created from signals of a plurality of frames in order to display one screen. Therefore, even if the user instructs the microcomputer 7 to display the data broadcast via the user I / F 6, it takes time until the data broadcast is actually displayed.

  Therefore, once the data broadcast can be displayed, the user instructs the microcomputer 7 to save the display data via the user I / F 6 when the user wants to display the data broadcast again. The microcomputer 7 controls the memory control circuit 3 to write the display data to the memory 4 and stores the display data as RGB signals in the memory 4.

  If the user subsequently wants to view the data broadcast data stored after receiving the video, the user again instructs the microcomputer 7 via the user I / F 6. The microcomputer 7 controls the memory control circuit 3 to read digital broadcast display data stored from the memory 4. The read data is provided to the display device 9 via the selector 5 and the drive circuit 8 and displayed. Data read from the memory 4 is converted into RGB signals that have undergone image quality improvement and resolution conversion by the signal processing circuit 2 and are suitable for displaying the display device. Can be displayed. As described above, the data broadcast can be quickly displayed after the first display and the second and subsequent times.

  In the above description, the screen to be saved is described as one screen, but a plurality of screens can be saved. In addition, the digital broadcast operation is performed in common with the user I / F 6 in the above, but it goes without saying that different user I / F means may be used.

(Embodiment 2)
In FIG. 2, reference numeral 10 denotes a bit compression circuit. When data is stored in the memory 4 by the memory control circuit 3, the bit compression circuit 10 converts the number of bits smaller than the number of normal display bits and then writes the data to the memory 4. To reduce the number of bits, multi-gradation techniques such as dithering, FRC, and noise shaping are used. By doing so, the memory capacity of the memory 4 can be reduced, and more screens can be stored with the same memory capacity.

  Since the television receiver according to the present invention can display a data broadcast quickly after the second time by writing the signal after being decoded into an RGB signal into the memory, it can receive a digital broadcast or a data broadcast. It is useful as a television receiver.

The figure which showed the block diagram of the television receiver of 1st Example of this invention The figure which showed the block diagram of the television receiver of 2nd Example of this invention

Explanation of symbols

1 Digital Broadcast Decoder 2 Signal Processing Circuit 3 Memory Control Circuit 4 Memory 5 Selector 6 User I / F
7 Microcomputer 8 Drive circuit 9 Display device 10 Bit compression circuit

Claims (6)

A television receiver capable of receiving a data broadcast and capable of quickly displaying the data broadcast after the second time by writing the signal after being decoded into RGB signals into a memory. In a television receiver capable of receiving data broadcast, a digital broadcast decoder circuit for converting a digital broadcast signal into an RGB signal, a signal processing circuit for improving the image quality and converting the resolution of the RGB signal, and reading and writing the output of the signal processing circuit A memory control circuit for performing the operation, a memory for writing and storing the output of the signal processing circuit, a selector for selecting the output of the signal processing circuit and a signal read from the memory, and the display of the user's data broadcast A user I / F for detecting a signal, a drive circuit for converting an output of the selector into a signal for driving a display display device, and a display device for displaying a television signal output from the drive circuit. A television receiving device. The television receiver according to claim 1, wherein the number of bits written to the memory is smaller than the number of bits before writing. 3. The television receiver according to claim 2, further comprising a bit compression circuit between the memory control circuit and the memory. The television receiver according to claim 2, further comprising a user I / F unit for displaying past data broadcasts in addition to the user I / F unit for displaying current data broadcasts in the television receiver capable of receiving data broadcasts. Receiver device. The television receiver according to claim 5, wherein a past data broadcast stores a plurality of display screens, and an arbitrary display screen can be selected.

Images