JPH04326880A - MUSE input signal identification display device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention identifies specific bits in a control signal multiplexed on a MUSE signal,
The present invention relates to a MUSE input signal identification and display device that identifies and displays the type of input signal media.

0002

2. Description of the Related Art Conventionally, there has been no method of displaying the type of MUSE input signal by identifying the input signal itself.

0003

[Problems to be Solved by the Invention] Therefore, it has not been possible to immediately recognize what kind of media the input signal is. The present invention aims to improve these drawbacks by using the MUSE
It is an object of the present invention to provide a MUSE input signal identification and display device that displays the type of input signal medium by identifying the input signal itself.

0004

[Means for Solving the Problems] The present invention provides a control signal extraction method for extracting a control signal multiplexed on a MUSE signal in a MUSE signal decoder or the like that receives various MUSE video media such as satellite broadcasting or VTR as an input signal. an identification circuit that identifies the type of signal medium from an identification signal consisting of specific bits included in the control signal and outputs a display switching signal; and a display unit that displays a display for each type of media according to the display switching signal. The present invention provides a MUSE input signal identification display device comprising:

[0005]

[Operation] The control signal extractor extracts the control signal multiplexed on the MUSE input signal. The identification circuit identifies what kind of media the input signal is, based on a specific bit in the control signal, and outputs a display switching signal for each media. The display section displays according to the display switching signal.

[0006]

[Example] Hereinafter, based on the drawings, a MUSE according to the present invention will be described.
An input signal identification display device will be explained. FIG. 1 is a block diagram of essential parts showing an embodiment of a MUSE input signal identification and display device according to the present invention. In the figure, 1 is a MUSE signal input line, 2 is a control signal extraction section, 3 is an identification circuit, and 4
5 is a display section consisting of a switching circuit 6 and LED or character display elements 7 to 10; 6 is a switching circuit that switches according to the display switching signal; and 7 to 10 are supplied with power via the switching circuit 6. , is an LED or character display element that lights up to indicate the type of signal medium.

Next, an outline of the control signal will be explained. Regarding the configuration and transmission format of the MUSE signal, as disclosed in related technical materials distributed by NHK Broadcasting Technology Research Institute, various signals are multiplexed in addition to the video signal and transmitted sequentially. The various signals include "control signals." The control signals are line numbers 559 to 563 and 1121 to 1.
125, sample number 1 for each line
These are signals that are multiplexed from No. 3 to No. 106. still,
The sample number is a number from 1 to 480 assigned to each line sampled at 480 points. The control signal has a total of 32 bits, and is divided into 8 blocks of 4 bits and sent three times in a row. The 32 bits are numbered sequentially from 1 to 32. Regarding the signals with bit numbers 21 to 32, although the specific use and specific allocation thereof are currently undefined as a standard broadcasting system, within this range there is an identification signal representing the type of signal media described above. (tentative name) is included. FIG. 2A shows an example of the relationship between the identification signal and the signal medium, and is an example in which the identification signal is represented by 3 bits. This is the "specific bit" referred to above, and the present invention utilizes this identification signal.

Next, the operation of the present invention will be explained based on the above content. The control signal extractor 2 extracts the control signal from the MUSE input signal and inputs it to the identification circuit 3. The identification circuit 3 identifies the type of signal media from the identification signal (specific bit) included in the control signal [FIG. 2(A)], and outputs a display switching signal (
Code 4) Do. Figure 2 shows an example of the display switching signal.
(A) It is the lower stage. In accordance with the display switching signal, the display section 5 displays an LED display or a character display as illustrated in FIG. 2(B). A specific example of the display section 5 is shown in FIG.

[0009]

As explained above, according to the present invention, in a MUSE signal decoder etc. that receives various MUSE video media such as satellite broadcasting or VTR as an input signal, MUSE
Since the type of video signal of the input signal is identified and displayed based on the identification signal consisting of specific bits in the control signal multiplexed with the USE input signal, the type of input signal can be recognized at a glance, making it easy to use with MUSE decoders, etc. This greatly contributes to improving the functionality of

[Brief explanation of drawings]

FIG. 1 is a block diagram of essential parts showing an embodiment of a MUSE input signal identification and display device according to the present invention.

FIG. 2A is a diagram showing an example of an identification signal and an example of a display switching signal for each type of video signal media, and FIG. 2B is a diagram showing an example of a display.

[Explanation of symbols]

1 MUSE signal input line 2 Control signal extraction section 3 Identification circuit 4 Display switching signal line 5 Display section 6 Switching circuit 7. LED or character display element 8. LED or character display element 9 LED or character display element 10 LED or character display element

Claims (1)

[Claims] 1. In a MUSE signal decoder or the like that receives various MUSE video media such as satellite broadcasting or VTR as an input signal, a control signal extraction section that extracts a control signal multiplexed on the MUSE signal, and a The present invention is characterized by being comprised of an identification circuit that identifies the type of signal media from an identification signal consisting of specific bits and outputs a display switching signal, and a display section that displays a display for each type of media according to the display switching signal. MUSE input signal identification display device.