JPH03174822A - Dispersal signal adding device - Google Patents

Abstract

PURPOSE:To control the level of a dispersal signal to be eliminated automatically with a satellite from which the signal is received by ascertaining the level of the dispersal signal to be eliminated in a dispersal signal eliminating device at the receiver side. CONSTITUTION:A dispersal signal addition means 14 adds a dispersal signal by a level of the dispersal signal decided by a dispersal signal level decision means 13 to a MUSE signal added with information of the dispersal signal by a dispersal signal level information addition means 15 based on the timing when a dispersal signal addition timing generating means 12. Thus, the information of the dispersal signal level is added to the MUSE signal and the level of the dispersal signal to be eliminated is confirmed by a dispersal signal elimination device at a receiver side. Thus, the level of the dispersal signal to be eliminated by a satellite from which the signal is received automatically controlled.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a dispersal signal addition device that adds a dispersal signal to a MUSE signal. By displaying on a wide screen and using 4-channel digital PCM audio, it aims to bring new appeal, such as the power and presence that cannot be obtained with current television broadcasting, and interest has been increasing in recent years in various countries. MUSE (
Multiple S ub-N yquist S
The Japan Broadcasting Corporation (NHK) has proposed a sampling encoding method. For details, please refer to Tasuku Ninomiya et al., "Satellite L-channel transmission system for high-definition television," IEICE Journal VO1, J 68-D.

No. 4, pp. 647-654 (1985), Watanabe, Takegahara, “Quasi-instantaneous compression DPCM method for high-definition audio baseband transmission,” Institute of Electronics, Information and Communication Engineers (March 1985)
month).

It is planned that this high-definition video will be transmitted nationwide via broadcasting and communication satellites. At this time, a dispersal signal is added for the purpose of reducing interference to terrestrial waves. The level of the added dispersal signal is 0.6M1(z) for broadcasting satellites, and 1.1MHz or 2.2M1(z) for communication satellites, and varies depending on the type of satellite used.

FIG. 2 shows a general configuration of a conventional dispersal signal adding device. In FIG. 2, 21 is vertical synchronization detection means, 22 is dispersal signal addition timing generation means, 23 is dispersal signal level determination means,
24 is dispersal signal adding means.

Next, the operation of the above conventional example will be explained. The vertical synchronization signal detection means 21 receives the MUSE signal and detects the vertical synchronization signal. The dispersal signal addition timing generation means 22 generates the dispersal signal addition timing based on the vertical synchronization signal detected by the vertical synchronization signal detection means 21. The dispersal signal level determining means 23 determines the dispersal signal level by an external operation.The dispersal signal adding means 24 inputs the MUSE signal and adjusts the dispersal signal adding timing generating means 22 to the generated timing. Accordingly, a dispersal signal corresponding to the dispersal signal level determined by the dispersal signal level determining means 23 is added and output.

(Problem to be Solved by the Invention) However, in the above conventional configuration, information on the dispersal signal level is not added to the MUSE signal.
In the dispersal signal removing device on the receiver side, there is a problem in that the level of the dispersal signal to be removed cannot be determined, and the level of the dispersal signal to be removed must be manually switched depending on the receiving satellite.

In order to solve the above-mentioned conventional problems, the present invention aims to
The object of the present invention is to provide a dispersal signal adding device that can add dispersal signal level information to SE 1m.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a dispersal signal adding device that includes a vertical synchronizing signal detecting means for a MUSE signal, and a vertical synchronizing signal detected by the vertical synchronizing signal detecting means. dispersal signal addition timing generating means for generating the dispersal signal addition timing based on the dispersal signal addition timing; dispersal signal level determining means for determining the dispersal signal level; and dispersal signal level determining means for determining the dispersal signal level determining means. dispersal signal level information adding means for adding information to the MUSE signal, and the dispersal signal addition timing generating means generating the dispersal signal addition timing for the MUSE signal to which the dispersal signal level information adding means has added the level information of the dispersal signal. Dispersal<
It is provided with at least n number adding means.

(Function) With the above-described configuration, the present invention allows the dispersal signal level information adding means to MUSE the dispersal signal level information determined by the dispersal signal level determining means.
The dispersal signal adding means adds information on the dispersal signal level to the MUSE signal at the timing generated by the dispersal signal addition timing generating means, and adds information on the dispersal signal level to the MUSE signal by the dispersal signal level information adding means. , since the dispersal signal equal to the dispersal signal level determined by the dispersal signal level determining means is added, information on the dispersal signal level can be added to the MUSE signal, and the dispersal signal removing device on the receiver side The level of the dispersal signal to be removed can be determined, and the level of the dispersal signal to be removed can be automatically controlled by the receiving satellite.

(Embodiment) FIG. 1 shows the configuration of a dispersal signal adding device in an embodiment of the present invention. In Figure 1,
11 is a vertical synchronization detection means, 12 is a dispersal signal addition timing generation means, 13 is a dispersal signal level determination means, 14 is a dispersal signal addition means, 15
is dispersal signal level information adding means.

Next, the operation of the above embodiment will be explained. In the above embodiment, the vertical synchronization signal detection means 11 detects the vertical synchronization signal from the input MUSE signal, and the dispersal signal addition timing generation means 12 detects the vertical synchronization signal.

The dispersal signal addition timing is generated based on the vertical synchronization signal detected by the vertical synchronization signal detection means 11. The dispersal signal level determining means 13 determines the dispersal signal level by external operation. The dispersal level information adding means 15 adds information on the dispersal signal level determined by the dispersal signal level determining means 13 to the MUSE signal. The dispersal signal addition means 14 applies the timing generated by the dispersal signal addition timing generation means 12 to the MUSE signal to which the dispersal signal level information addition means 15 has added the level information of the dispersal signal,
A dispersal signal corresponding to the dispersal signal level determined by the dispersal signal level determining means 13 is added. According to the configuration of the above embodiment, the information on the dispersal signal level determined by the dispersal signal level determining means 13 is transferred to the dispersal signal level information adding means 1.
5 is added to the MUSE signal, and the dispersal signal adding means 14 adds the dispersal signal level information to the timing generated by the dispersal signal addition timing generating means 12, and the dispersal signal level information adding means 15 adds information on the dispersal signal level. Since a dispersal signal corresponding to the dispersal signal level determined by the dispersal signal level determining means 13 is added to the added MUSE signal, information on the dispersal signal level can be added to one MUSE signal, and the receiver side In the dispersal signal removal device of 2008, the level of the dispersal signal to be removed can be determined, and the level of the dispersal signal to be removed can be automatically controlled by the receiving satellite.

(Effects of the Invention) As is clear from the above-mentioned embodiments, the present invention is such that the dispersal signal level information adding means adds information on the dispersal signal level determined by the dispersal signal level determining means to the MUSE signal. The signal adding means applies the dispersal signal level determination method to the MUSE signal to which dispersal signal level information has been added by the dispersal signal level information adding means, based on the timing generated by the dispersal signal addition timing generating means. Since the dispersal signal corresponding to the dispersal signal level determined by the means is added, information on the dispersal signal level can be added to the MUSE signal, and in the dispersal signal removing device on the receiver side,
This has an excellent effect in that the level of the dispersal signal to be removed can be determined, and the level of the dispersal signal to be removed can be automatically controlled by the receiving satellite.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a dispersal signal adding apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional dispersal signal adding apparatus. 11, 21... Vertical synchronization signal detection means, 12°22.
...Dispersal signal addition timing generation means, 13
．． 23...death signal level determining means, 14.
24...Dispersal signal addition means, 15...Dispersal signal level information addition means.

Claims (1)

[Claims] MUSE signal vertical synchronization signal detection means, dispersal signal addition timing generation means for generating a dispersal signal addition timing based on the vertical synchronization signal detected by the vertical synchronization signal detection means, and determining a dispersal signal level. dispersal signal level determining means; dispersal signal level information adding means for adding information on the dispersal signal level determined by the dispersal signal level determining means to the MUSE signal; A dispersal signal corresponding to the dispersal signal level determined by the dispersal signal level determining means based on the timing generated by the dispersal signal addition timing generating means with respect to the MUSE signal to which signal level information is added. 1. A dispersal signal adding device comprising at least dispersal signal adding means for adding.