JPH0435481A - Control information transmission system - Google Patents

Abstract

PURPOSE:To transmit a control code without adding a transmission path by providing a control information generation means generating control information in response to setting operation and a changeover means performing time division and multiplexing to an idle line in a MUSE signal reproduction device, and providing a latch means 23 latching the control information in a MUSE decoder. CONSTITUTION:A multiplex data forming circuit 17, inputting respective outputs of a control code generation circuit 18 of a MUSE disk player, generates the multiplex data compressed by time axis to the idle line, and a data changeover circuit 16 selects and introduces the multiplex data. On the other hand, a MUSE decoder latches a character code of the idle line by a control code latch circuit 23, operates a still picture reproduction means 21a in a MUSE decode circuit 21 to execute readout repeatedly by the built-in memory of the MUSE signal, and enables the still picture reproduction. Thus, the control code formed on the MUSE reproduction side can be supplied to a decode side without adding the transmission path.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a control information transmission system that is effective and applicable to a MUSE playback system.

(b) Prior Art The signal arrangement of one frame of the MUSE signal is as shown in FIG. 4 (1), and the 564th line is the only empty line. When transmitting a MUSE signal, a program transmission control signal is multiplexed onto this empty line and used for signal control such as broadcasting, and when recording a MUSE signal on a recording medium, an address signal is multiplexed and used for address search and storage. I)
Used for calculating playback time, etc.

(c) Problems to be solved by the invention However, the λIUS that reproduces the MUSE signal from the recording medium
The E playback device must have the function to control the operation of the SE decoder by operating the playback device during playback, but there is usually no connection between the playback device and the There was no transmission line for the reproduced signal, and a separate signal line had to be added for multiplexed display.

Therefore, it is necessary to multiplex and transmit the MUSE signal on the transmission path.

(d) Means for solving the problems Therefore, the present invention replaces and multiplexes control information on an empty line instead of a reproduction address signal on the MUsE reproduction device side, and
This is characterized in that control information is latched on the E-decoder side to control the controlled means.

(e) According to the present invention, the control information generated by the operation of the MUSE playback device is multiplexed onto the empty address of the playback signal and transmitted to the MUSE decoder side. Controls the operation of the control means of the 14USE decoder.

(f) Example Hereinafter, the present invention will be explained according to an illustrative embodiment.

This embodiment uses an ML:SE video disc player and an MU
The present invention is applied to a system that connects an SE decoder to form and derive a high-definition signal.

FIG. 1 shows an additional circuit provided in the MUSE video disk 7 layer of this embodiment. The reproduced signal is input to the pilot signal sampling circuit 1 composed of a bandpass filter, and the demodulated reproduced MUSE signal is input to the AD It is input to the conversion circuit 3. The extracted regenerated pilot signal is used as a PLL
It is input to circuit 2 and the same wave number (
18,225 MHz) write clock. The second write clock is supplied as a timing clock to the AD conversion circuit 3. The AD conversion data is stored in the time base collector memory 4 in synchronization with the write clock. This stored data is read out according to the read clock generated by the fixed oscillation circuit 5, and the data switching circuit 16
is input to the address launch circuit 6. The address launch output is input to the address update circuit 10, where the address for i'L1 frame is updated and an address to be multiplexed on the next empty line is prepared. This address update output is input to the ASCII code conversion circuit 12 during the next empty line multiplexing period and is converted into an address code.

On the other hand, the λ4USE disc player of this embodiment has an address search function and a mode setting function.

The address search means 7 compares the address set by operating the address setting button group 8 with the address latch output, and supplies the search output to the pickup moving motor and the tracking coil to realize the address search.

Further, when the mode setting button group 15 is operated, the setting operation state is latched in the operation state launch means 14, and this launch output is supplied to the system control circuit 11 to set the mode. Furthermore, the character data generation circuit that inputs the latch output inputs the character signal of the alphabet corresponding to the operation state one character at a time to the empty line.
2.

Furthermore, in the non-implemented column f, a still image playback setting operation function is provided on the MUSE disc player side, and the still image playback function is controlled by memory control on the MUSE decoder side.

Therefore, in conjunction with the operation of the still image button in the mode setting button group 15 of the MUSE Denosk player, the control code generation circuit 18 generates a still image reproduction code corresponding to the empty line. Further: 2. The control code generation circuit 18 generates a still image reproduction code by inputting the search completion output issued when the address search means 7 reproduces the MUSE signal from four fields before the search address. are doing.

Further, the control code generation circuit 18 has a display control voice button 9a, a mode display button 9b, an address display button 9c,
With this operation, an audio mute code, mode display mute code, and address display mute code are generated during the empty address period.

A multiplex data forming circuit 7 which inputs the respective outputs of the ASCII code conversion circuit 12 and the control code generation circuit 18 generates multiplex data compressed in the time axis in the arrangement shown in FIG. 2 on an empty line, Data switching circuit 16
In this method, multiplexed data is selectively derived in place of reproduced MUSE data only during an empty line period. This switching output is input to the DA conversion circuit 19, converted into an analog signal, and derived as the MUSE disc player output.

As shown in FIG.
It is supplied to a control data latch circuit 23, a character code latch circuit 24, and an address code latch circuit 25. The MUSE decoding circuit 21 stores the ML:SE multiplied signal field in a built-in memory in synchronization with a 16.2 MHz fixed clock generated by a fixed oscillation circuit 22, and then performs decoding processing to generate the audio corresponding to the high-definition video signal. A signal is formed and derived to supply corresponding signals to the character multiplexing circuit 29 and the audio mute circuit 30. Also,
The control code latch circuit 23 latches the character code of an empty line in synchronization with a fixed clock, the character code latch circuit 24 latches the character code, and the address code latch circuit 25 latches the address code. The latched character code and address code are supplied to a pattern signal generation circuit 26, changed into pattern signals, and inputted to a mode display mute circuit 27 and an address display mute circuit 28, respectively. The control code latch circuit 23 supplies a control signal to a mute circuit or a control circuit corresponding to the latched control code. Therefore, when the still image reproducing code is latched), the still image reproducing means 21a in the MUSE decoding circuit 21 is activated, prohibiting update storage of the MUSE signal in the built-in memory and repeatedly reading out the same stored information. This allows for still image playback. Also, when the audio mute code is launched, the audio mute circuit 30 is activated to mute the audio, and when the mode display mute code is latched, the mode display mute circuit 27 is activated to mute the mode display, and the address mute code is activated. When latched, the address mute circuit 28 is activated to enable address mute.

Therefore, when the audio button 9a is operated, audio mute is activated, and when the mode display button 9b is operated, rPLAY is activated.
When the address display button 9c is operated, the MUSE decoder side controls the inhibition of mode H indication (7) of B, rsTopJ, etc., and the inhibition of display of the address number, etc., respectively.

(g) Effects of the Invention According to the present invention, the control code regenerated on the MUSE playback side can be supplied to the decoder side without adding a transmission path, and the effect is great.

[Brief explanation of the drawing]

FIG. 1 is a main circuit block diagram of a MUSE playback device according to a first embodiment of the present invention, FIG. 2 is an explanatory diagram of a multiplexed signal arrangement,
FIG. 3 shows a circuit block diagram of the MUSE decoder side, and FIG. 4 shows an explanatory diagram of the MUSE signal arrangement. 18,---Control code generation circuit 16
, -------Data switching circuit 23------Control code generation circuit 21
a ---------1 still image reproduction means Developing person Mie Oki Co., Ltd. agent Patent attorney Takuken Uchino (2 others) Figure 2 Figure 3 Etre Matai - F Court MUSE Tecota Figure 4

Claims (1)

[Claims] (1) A MUSE signal reproducing device that reproduces a multiplexed MUSE signal obtained by time-division multiplexing of address data on empty lines of each frame from a recording medium converts the reproduced MUSE signal obtained from the MUSE signal reproducing device into a high-definition signal. In the MUSE playback system which is connected to a MUSE decoder that derives the address data, the MUSE signal playback device includes: control information generating means 18 that generates control information in response to a setting operation; A switching means 16 for time-division multiplexing control information onto the empty line is provided in the MUSE decoder; a latch means 23 for latching the control information; and a latch means 23 for controlling the operation of the MUSE decoding circuit based on the latched control information. A control information transmission system characterized in that a control means 21a is provided.