JPH0548552A - Method to stabilize switching digital audio interface signal - Google Patents

Abstract

(57) [Abstract] [Purpose] In the main adjustment unit, the demodulator locks and switches the digital audio interface signal in a stable state. [Constitution] Material (1), material (2) are A / D converters 1, 2
It is converted into a digital signal by, and further modulated into a digital audio interface signal. The material (1) is selected in the BASE row (1), and then the material to be selected in the BASE row 17 is selected in the BASE row (2). For example, the material (2) is BA
Select in SE column (2). The demodulator 12 can output stable data if a sufficient time for locking and stabilization is selected here. Switch 15 in this state
By switching, stable data appears on the BASE column 17.
The same applies to the OL column.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio master (main adjustment device) used for TV stations, radio stations, etc., and a method for stabilizing the switching of digital audio interface signals of the TV master.

[0002]

2. Description of the Related Art Conventionally, TV masters and radio masters of this kind switch analog signals, and signals are switched by simply switching cross points. That is, since there is no demodulator, it is not necessary to consider the time until the demodulator stabilizes. FIG. 2 shows a schematic configuration around a master (analog) cross point in a conventional example. In FIG. 2, 20 is a cross point, 2
1, 22, 23, and 24 are points of cross points, 25 is a base (BASE) sequence, and 26 is an overlap (OL) sequence.
Now, in the BASE 25, when it is desired to send the material (2) after the material (1), the point 21 of the cross point is opened, and the point 22 of the cross point is closed so that the material (2) is in the BASE row 25. Can be sent to. OL
The same applies to row 26.

[0003]

However, in the configuration of the conventional main adjustment device described above, the digital audio
When switching interface signals, a demodulator exists if switching is performed only at digital crosspoints, and it takes time until the demodulator locks and stabilizes, which causes a problem of sound interruption. The present invention solves such a conventional problem and is an excellent digital master device capable of instantaneously switching digital audio interface signals.
It is intended to provide (main adjustment device).

[0004]

In order to achieve the above object, the present invention provides a BASE sequence (1) and a BASE sequence.
(2) is provided, and the OL column (1) and the OL column are similarly provided.
(2) is provided, and the material you want to select next is the other row in advance.
(For example, if the BASE string (1) is in the BASE string (2)), the switch is switched while the demodulator is locked and stable data is output.
The ASE column (1) is switched to the BASE column (2) so that the target material is taken out to the BASE column. The one selected by the switch is the on-air (OA) row.

[0005]

Therefore, according to the present invention, two BASE sequences are provided.
(BASE (1) and BASE (2)) and each has a demodulator, so that the other BASE string can hold the material to be selected next, thereby locking the demodulator and stabilizing the output data. By switching the switch, the switch can be instantaneously performed. The OL column is also the same as the BASE column.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a schematic structure around a digital cross point of a digital master in one embodiment of the present invention. In FIG. 1, 1, 2, 3,
4 is an A / D converter for converting an analog signal into a digital signal, 5 is a digital cross point, 6,
Reference numerals 7, 8 and 9 are digital cross points, 11, 12, 13, and 14 are demodulators, 15 and 16 are switches, 17 is a BASE train, and 18 is an OL train.

Next, the operation of the above embodiment will be described.
The materials (1), (2), (3) and (4) are converted from analog signals into digital signals by A / D converters 1, 2, 3 and 4, respectively, and further modulated into digital audio interface signals. Digital Cross Point 5 Digital Cross Point Point 6,
7, 8 and 9 are selected, Material 1 is in the BASE row (1), Material 2 is in the BASE row (2), Material 3 is in the OL row (1), Material 4
Are connected to the OL column (2), and demodulators 11 and 1 respectively
Locked at 2, 13, 14 and sends stable data. When it is desired to send the material (2) to the BASE string 17 after the material (1), the material (2) can be instantaneously sent to the BASE string 17 by switching the switch 15 in this state. By sequentially replacing the materials in the BASE rows (1) and (2) in this way, it is possible to send the materials to be sent alternately and without interruption. In the above description, the BASE sequence has been described, but the same applies to the OL sequence.

[0008]

The present invention has the following effects, as is apparent from the above-mentioned embodiments. (1) Since there are two BASE columns (BASE (1), BASE (2)) and each has a demodulator, digital
The audio interface signal can be locked with a demodulator and switched in a stable state. (2) Since there are two BASE columns, it is possible to switch and send the voices that alternate and alternate.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram around a digital cross point of a digital master in one embodiment of the present invention.

FIG. 2 is a schematic configuration diagram around a master (analog) cross point in a conventional example.

[Explanation of symbols]

1, 2, 3, 4 ... A / D converter, 5 ... Digital cross point, 6, 7, 8, 9 ... Digital cross point, 11, 12, 13, 14 ... Demodulator, 15, 16 ... Switch, 17,25 ... Base (BASE
Row), 18, 26 ... Overlap (OL) row, 20 ... Crosspoint, 21, 22, 23, 24 ... Crosspoint point.

Claims (1)

[Claims] 1. A digital signal is first locked by a first demodulator by a first column which is an on-air (ON-AIR) column, and a digital signal is locked by a second column which is a NEXT column. A method for stabilizing the switching of a digital audio interface signal, characterized in that the second demodulator is locked in a standby state and is switched by a switch in a stable state at the time of switching.