JPH04226500A - Time divided multiple talkie transmission device with program searching function - Google Patents

Abstract

PURPOSE:To facilitate the selecting, program searching and transmitting of arbitrary messages (or the same message) to each of respective time divided and multiplexed lines with just one set of the talkie transmission device. CONSTITUTION:The voice signals which are divided in addresses in correspondence to the kinds of talkies (messages) and are subjecte to PCM coding are previously stored into a ROM 27. A transmission counter 2 applies the basic timing for talkie transmission and a time slot counter 1 applies its time slot position. The transmission start time is stored into a control memory 25 in correspondence to the time slot and is computed by a computing element 6 when the talkie kind number and transmission start time corresponding to the time slot are assigned from the outside. This start time is made together with the talkie kind number into the address of the ROM 27. The voice signals are read out of the ROM 27 in accordance with this address and are converted to serial signals by a parallel/serial converter 8. These signals are outputted.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a time-division multiplex talkie transmitting device with a cueing function, and more particularly, it sequentially reads out digital audio signals stored in a memory,
This invention relates to a talkie (voice signal) sending device that sends a message as a message to a time-division multiplexed line.

0002

[Background Art] In recent years, due to the development of PCM technology and LSI technology, talkie (audio signal) transmitting devices that transmit audio signals directly store audio data to be transmitted as digital data of PCM code in memory. , a method of sequentially reading and transmitting data in accordance with the transmitting timing has been used. When cuing up a talkie (message) using this talkie sending device, by sending out the talkie periodically and connecting at the beginning of the talkie using the timing that indicates the start of the talkie, the apparent cue can be avoided. I was going.

[0003] Furthermore, when connecting a plurality of lines, talkie transmitting devices for the number of lines to be connected have been provided.

[0004] In addition, when selecting a talkie (message) from a plurality of talkie (message) types and starting the cue, it is necessary to have a talkie sending device compatible with the talkie (message) and connect the communication path at the start of sending. By initializing the , the beginning of the playback was performed.

[0005]

SUMMARY OF THE INVENTION The conventional talkie (voice signal) transmitting device described above transmits voice from the middle when a talkie (message) is connected. Furthermore, when apparent cueing is used, there is a problem in that a silent period occurs depending on the timing of the start of talkie transmission. In addition, if you try to start a talkie (message) connection for each connection line, you will need talkie sending devices for the number of connection lines, and if you select from multiple talkie (message) types, the talkie (Message) Talkie transmitting devices for each type of message are required for each connection line, which poses a problem in that the amount of hardware increases.

[0006]

[Means for Solving the Problems] The multiple talkie device of the present invention is a talkie sending device that sequentially reads digital audio signals stored in a memory and sends them out as talkies.
an audio signal memory that stores digital audio signals to be transmitted in units of a predetermined bit length; and a transmission counter that is counted up at predetermined time intervals and provides basic timing for transmitting a talkie corresponding to a read cycle of the digital audio signal in units of the predetermined bit length; A time slot counter that provides the time slot position corresponding to the time-division multiplexed line during the basic talkie transmission timing, and a time slot counter that stores the talkie transmission start time for each time slot, and performs this transmission in synchronization with the output of the time slot counter. a control memory that outputs a start time; a write control means that receives a designation of a transmission start time corresponding to the time slot from the outside and writes it into the control memory; and performs an operation based on the output of the transmission counter and the output of the control memory. and an arithmetic unit that outputs the transmission timing for each of the time slots, and the output of the arithmetic unit specifies the address of the audio signal memory for each of the time slots and outputs the stored digital audio signal in units of the predetermined bit length. By reading and sending,
The configuration is such that the cue of the transmitted talkie is independently performed for each time-division multiplexed line.

Another time-division multiplex talkie device with a cueing function of the present invention is a talkie transmitter that sequentially reads out digital audio signals stored in a memory and sends them out as a talkie, which is composed of a plurality of blocks into which addresses are divided. an audio signal memory that stores digital audio signals for each of a plurality of talkie types in corresponding blocks in units of predetermined bit length; and a talkie output that is counted up at predetermined time intervals and corresponds to a reading cycle of the digital audio signal in units of the predetermined bit length. A send counter that provides basic timing,
A time slot counter that provides the time slot position corresponding to the time-division multiplexed line during the basic talkie sending timing, and a talkie type number and talkie sending start time for each time slot are stored and synchronized with the output of the time slot counter. a control memory for outputting the talkie type number and the sending start time; a write control means for receiving an external designation of the talkie type number and the sending start time corresponding to the time slot and writing the talkie type number and the sending start time into the control memory; an arithmetic unit that performs calculations based on the output of the counter and the transmission start time being output from the control memory and outputting the transmission timing for each time slot; the output of the arithmetic unit and the talkie type being output from the control memory; By specifying the address of the audio signal memory for each time slot using the number and reading out the stored digital audio signal in units of the predetermined bit length and transmitting it, any type of transmission talkie can be generated that is compatible with time division multiplexed lines. This configuration allows the cueing of each to be performed independently.

Each of the above configurations further includes a parallel/serial converter that converts the digital audio signal read from the audio signal memory from a parallel signal of the predetermined bit length into a serial signal for each time slot and sends the serial signal. It can be done.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of a first embodiment of the present invention. The time-division multiplex talkie transmitter with a cueing function of this embodiment includes a transmitter counter 2 that provides basic talkie transmit timing, and a time slot position for transmitting talkies (audio signals) corresponding to time-division multiplexed lines. a control memory 5 that stores the talkie transmission start time; a write control circuit 3 that writes the transmission start time for each time slot into the control memory 5 via the address selector 4; an arithmetic unit 6 which calculates the sending timing for each time slot from the output and the output of the control memory 5; and a read-only memory (which stores an n-byte PCM coded audio signal and uses the output of the arithmetic unit 6 as a read address). ROM) 7, and a parallel/serial converter 8 for converting the parallel output of the read-only memory (ROM) 7 into a serial talkie output.

Next, the operation will be explained.

FIGS. 2 and 3 are time charts of various signals in the embodiment shown in FIG. The timing signal (D9) is
A signal for operating the sending device of the present invention, 12
It consists of a frame pulse (D9a) with a period of 5 μS and a clock (D9b) used for signal transmission. The time slot counter 1 is initially set (cleared to 0) when the frame pulse (D9a) is input based on the timing signal (D9), and is counted up by 1 every 8 clocks (D9a) to calculate the transmission time corresponding to each line of the k multiplex. Slot signal (
D11) is output. The sending counter 2 counts up by 1 for each frame pulse (D9a) of the timing signal (D9), and outputs the sending timing (D17) corresponding to each 1-byte audio signal of all lines.

The write control circuit 3 reads and writes the control memory write address (D12) corresponding to the time slot position of the time division multiplexed connection line and the control memory 5 based on the write control signal (D10) from the outside. Control memory address selector switching signal (D
13) and a control memory write signal (D14). Based on the control memory address selector switching signal (D13), the control memory address selector 4 selects the sending time slot signal (D11) which is the output of the time slot counter 1 at the read timing, and selects the control memory write address (D12) at the write timing. ) is selected and output as a control memory address signal (D15). Writing to the control memory 5 is performed using the control memory write signal (
D14), control memory address signal (D15)
The sending timing (D17: m (=0 to n-
1)) is performed as data.

The arithmetic unit 6 calculates the sending timing (D17:m) which is the output of the sending counter 2, and the sending start time (D16:S0 to Sk-) corresponding to the next sending time slot which is the output of the control memory 5. 1), that is, the value of the sending timing (D17) during write execution, and calculating the sending timing (D18:T0) for each time slot.
~Tk-1). This calculation formula is shown below.

[0015] A read-only memory (R
OM) 7 is the transmission timing (D
18), byte unit PCM data (D19: TS0 to TSk-1) stored in the corresponding address
) is output.

[0016] The PCM data (D19) in bytes is:
The signal is converted into a serial talkie output (D20) by the parallel/serial converter 8, and is output to a time-division multiplexed line corresponding to the time slot.

FIG. 4 is a block diagram showing a second embodiment of the present invention, in which a talkie (message) type selection function is performed. In FIG. 4, circuits and signals having the same reference numerals as those in FIG. 1 have the same functions as those in the embodiment of FIG. 1, and therefore their explanations will be omitted.

FIG. 5A shows the read-only memory (R
FIG. 5B shows the data structure in the read-only memory (ROM) 27. The read-only memory (ROM) 27 consists of 8 blocks that store audio signals in bytes, and has a time length of 12
8 messages of 5μS x 2P or less (message #1
~ #8) I remember.

Next, the operation will be explained.

The transmission timing (D17) at the time of writing to the address specified by the control memory address signal (D15) is sent to the control memory 25 as the lower p bits of the data, and the write control signal (D210) from the outside is sent to the control memory 25. The 3 bits indicating the message number (#1 to #8) are the upper 3
A total of p+3 bits of data are written as bits based on the control memory write signal (D14).

The arithmetic unit 6 calculates the sending timing (D17) which is the output of the sending counter 2 and the output (D17) of the control memory 25.
216), which is the transmission start time (D16) corresponding to the next time slot to be transmitted, is calculated to create the transmission timing (D18) for each time slot. Read-only memory (R
OM) 27 is the transmission timing (
PCM in bytes in synchronization with the address indicated by the upper 3 bits of control memory output (D18) and control memory output (D216).
Output data (D19).

[0022] PCM data (D19) in bytes is as follows:
The parallel/serial converter 8 converts it into a serial talkie output (D20) and outputs it.

As described above, it is possible to select and cue any message for each time-division multiplexed line.

[0024]

As explained above, the present invention provides a talkie (audio signal) sending device that sequentially reads out and sends out audio signals stored in a memory. A set of addresses of the audio signal memory is created by calculating the time slot counter that provides the time slot position for time-division multiplexing and transmitting the audio signal. There is an advantage that the talkie sending device alone can send out the cued talkies to each of the time-division multiplexed lines.

Further, in this talkie device, the audio signal memory is an audio signal memory that is made up of a plurality of blocks into which addresses are divided and stores digital audio signals for each of a plurality of transmitted talkie types in corresponding blocks, and the control memory and By making the write control means of this control memory a control memory and write control means which receive a talkie type number together with a transmission start time from the outside and process it as address information specifying a block of the audio signal memory, one set of talkie This has the advantage of being able to select and cue any talkie (message) for each time-division multiplexed line and send it out using only the sending device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a first embodiment of the invention.

FIG. 2 is a time chart of signals of various parts of the present invention.

FIG. 3 is a time chart of signals of various parts of the present invention.

FIG. 4 is a block diagram of a second embodiment of the invention.

FIG. 5 is a diagram showing the address and data structure of the read-only memory in FIG. 4;

[Explanation of symbols]

1 Time slot counter 2 Send counter 3 Write control circuit 4 Control memory address selector 5, 25
Control memory 6 Arithmetic unit 7, 27 Read-only memory (ROM) 8
parallel/serial converter

Claims (3)

[Claims] Claim 1: In a talkie sending device that sequentially reads out digital audio signals stored in a memory and sends them out as a talkie, an audio signal memory that stores digital audio signals to be sent in units of a predetermined bit length and a digital audio signal that is counted up at predetermined time intervals. a transmission counter that provides a basic talkie transmission timing corresponding to the read cycle of the digital audio signal in units of the predetermined bit length; and a time slot counter that provides a time slot position corresponding to a time division multiplexed line during the talkie transmission basic timing. , a control memory that stores the talkie transmission start time for each time slot and outputs this transmission start time in synchronization with the output of the time slot counter, and a control memory that receives specification of the transmission start time corresponding to the time slot from the outside. It includes a write control means for writing into the control memory, and an arithmetic unit that performs calculations based on the output of the sending counter and the output of the control memory and outputs the sending timing for each of the time slots, and the output of the calculating unit determines the timing. By specifying the address of the audio signal memory for each slot and reading out and transmitting the stored digital audio signal in units of the predetermined bit length, the beginning of each output talkie is independently performed in response to a time-division multiplexed line. A time-division multiplex talkie transmitter with a cueing function. 2. In a talkie sending device that sequentially reads digital audio signals stored in a memory and sends them out as talkies, the digital audio signals for each of a plurality of talkie types to be sent out are made up of a plurality of blocks into which addresses are divided, in units of a predetermined bit length. an audio signal memory stored in a corresponding block, a transmission counter that is counted up at a predetermined time interval and provides a basic talkie transmission timing corresponding to the reading cycle of the digital audio signal in units of the predetermined bit length, and during this basic talkie transmission timing. A time slot counter provides the time slot position corresponding to the time-division multiplexed line, and stores the talkie type number and talkie transmission start time for each time slot, and stores the talkie type number in synchronization with the output of the time slot counter. and a control memory for outputting a transmission start time, a write control means for receiving an external designation of the talkie type number corresponding to the time slot and a transmission start time and writing it into the control memory, and an output of the transmission counter and the control. an arithmetic unit that performs calculations based on the transmission start time being output from the memory and outputs the transmission timing for each of the time slots; By specifying the address of the audio signal memory for each audio signal and reading and transmitting the stored digital audio signal in units of the predetermined bit length, it is possible to independently locate the beginning of any type of output talkie corresponding to a time-division multiplexed line. A time division multiplex talkie transmission device with a cueing function. 3. A parallel/serial converter for converting the digital audio signal read from the audio signal memory from a parallel signal of the predetermined bit length into a serial signal for each time slot and transmitting the serial signal. The time division multiplex talkie transmitter with cueing function according to item 1 or 2.