JPH03195150A - High efficiency multiplexing transmission system - Google Patents

Abstract

PURPOSE:To improve transmission efficiency by recognizing an unnecessary identification bit and sending out data to a transmission line while inserting packet data instead of the unnecessary identification bit even when generating the unnecessary identification bit by setting the format of a transmission frame. CONSTITUTION:When the data are transmitted at various transmission speed between a transmitter 10 and a receiver 30 which are provided while being faced each other, a timing generation part 16 is provided on the transmission side to be controlled by set information to set the format of the transmission frame on a transmission line 20 in advance. Out of the identification bits at the transmission frame, the unnecessary identification bit to be generated by integer multiple transmission as the minimum unit on the transmission line 20 is recognized and the data are transmission while inserting the packet data to the area of the unnecessary bit. Further, a timing generation part 35 is provided on the reception side so that the transmitted data can be restored and received. Thus, on the reception side, the data to be transmitted can be restored and received based on the set information and the data can be transmitted while effectively utilizing the area of the unnecessary bit. Then, the data transmission efficiency can be improved.

Description

[Detailed Description of the Invention] [Summary] Regarding a high-efficiency multiplex transmission device that inserts packet data into a silent section of an audio signal or a section where no unpacketized data exists, unnecessary bits that occur when transmitting in integral multiples The purpose of this technology is to improve transmission efficiency by recognizing and inserting packet data. When data is transmitted at various transmission speeds between a transmitting device and a receiving device provided, a timing generation unit is provided on the transmitting side that is controlled by setting information that sets the format of the transmission frame on the transmission path in advance, and the transmission frame is Among the identification bits in the transmission path, unnecessary bits that occur when transmitted in integral multiples of the minimum unit on the transmission path are recognized, and packet data can be inserted into the area of the unnecessary bits for transmission. A generation unit is provided to restore and receive the transmitted data, and the configuration is configured to improve the transmission efficiency of the transmitted and received data.

C. Field of Industrial Application] The present invention relates to a highly efficient multiplex transmission device that inserts packet data into a silent section of an audio signal or a section where no data that is not packetized exists.

[Conventional technology]

FIG. 6 is a diagram showing the configuration of the data transmission device.

Further, FIGS. 7(a) and 7(b) are diagrams showing the structure of a transmission frame, and show the data structure used in the data transmission apparatus of FIG. 6. In the figure, 10 is a transmitting device, 2° is a transmission path, and 30 is a receiving device. Data transmission and reception as shown in FIG.
On the other hand, the receiving device 30 receives the data on the transmission path 20, separates it into voice/data or packet data, and receives the data.

The first data channel to sixth data channel (hereinafter referred to as CHI to CH6) shown in FIG. 6th identification bit (hereinafter referred to as ID)
1 to ID6) are each of the above-mentioned CHI to CH6.
1 bit corresponds to each. That is, CHI~
101 to 106 are assigned to each of CH6, and when the data of any channel from CHI to CH6 is voice/data, "1° is assigned, and C
When the data from HI to CH6 is packet data, “0”
Assign. The 1° and "O' bits can be used to identify the presence or absence of voice/data for CHI-CH6, and furthermore, the data of CHI-CH6 and I
One frame is composed of data from DI to ID6.

When packet data is inserted into a silent section of an audio signal or a section where no unpacketized data exists, and communication is performed using a preset transmission frame, the number of identification bits that indicates the presence or absence of data is determined by The number of channels required is the same as the number of data channels when configured with the minimum data, for example, as shown in Figure 7(a), a fixed number of 6
Bits are allocated as required.

However, in the case of such a transmission frame structure, the seventh
ID5 and I of the identification bits that become unnecessary when transmitting data with different transmission speeds in the same frame, such as CHI, CH2, CH3 and CH4, as shown in Figure (b).
D6 will now occur.

Next, the operation of the transmitter/receiver will be explained with reference to FIGS. 8 and 9. FIG. 8 is a diagram showing the configuration of a conventional transmitting device,
FIG. 9 is a diagram showing the configuration of a conventional receiving device,
Each corresponds to the transmitting device 10 and receiving device 30 in FIG. The sending bag W10 in FIG.
, an audio/data presence/absence detection section 12 , a second delay section 13 , a selection section 14 , and a multiplexing section 15 . Further, the receiving device 30 in FIG. 9 includes a main separator 31, a sub-separator 32, a noise pattern generator 33, and a selector 34.

The audio/data input to the transmitting device 10 is transmitted to the first delay section 1
1 and is branched to and input to the audio/data presence/absence detection section 12. The audio/data input to the audio/data presence/absence detection unit 12 is
For example, when audio/data is “present,” it outputs l°, and when audio/data is “absent” and packet data is inserted, it outputs an identification bit that is “0°,” and branches into two. One is input to the second delay unit 13, converted into a phase-adjusted identification bit, and output to the selection unit 14, and the other is input directly to the selection unit 14. The audio/data input to the first delay section 11 on the - side is input to the second delay section 13 and phase-adjusted so as to have the same phase as the phase-adjusted identification bit, and then input to the selection section 14 . Therefore, in the selection section 14, the identification bit enables selection of voice/data and packet data input when there is no voice/data, and both data are inputted to the multiplexing section 15 as shown in FIG. The signals are multiplexed into the transmission frames shown in FIG. 7(a) and FIG.

On the other hand, the data received from the transmission path 20 in the receiving device 30 is processed into identification bits and audio/voice data in the main separation unit 31.
The data is separated into three data, data and packet data, and the identification bit is input to the sub-separator 32 and the selector 34 and becomes a selection signal. Both the voice/data and packet data are separated into voice/data by the identification bit in the sub-separator 32.
The data and packet data are separated, and the voice/data is added to the selection section 34, and the packet data is directly output. Note that the selection unit 34 includes the noise pattern generation unit 33
A selection is made to separate the noise generated in the packet data and insert it into a blank space where there is no voice or data, and it is received as voice or data containing noise.

[Problem to be solved by the invention]

Therefore, when transmitting data with different transmission speeds, unnecessary identification bits are still generated and transmitted.
There is a problem that transmission efficiency decreases.

The present invention aims to improve transmission efficiency by recognizing unnecessary bits that occur when transmitting in integral multiples and inserting packet data. [Means for Solving the Problem] In the present invention, In a data transmission device that inserts packet data into a silent section of an audio signal or a section where no unpacketized data exists, when transmitting data at various transmission speeds between a transmitting device 10 and a receiving device 30 that are arranged oppositely, The transmission side is provided with a timing generator 16 that is controlled by setting information that sets the format of the transmission frame on the transmission path 20 in advance, and transmits the identification bits in the transmission frame in integral multiples of the minimum unit on the transmission path 20. The system recognizes unnecessary bits that occur when the data is transmitted, inserts packet data into the area of the unnecessary bits, and transmits the data.Furthermore, a timing generator 35 is provided on the receiving side so that the transmitted data can be restored and received. The system is configured to improve the transmission efficiency of transmitted and received data.

[For production]

In the present invention, the configuration shown in FIGS. 1 and 2 is adopted, and the timing generation unit 16 uses the identification bit that detects the presence or absence of voice/data and the setting information that sets the format of the transmission frame on the transmission path 2o in advance. Unnecessary focusing that occurs when transmitting in integral multiples of the minimum unit on the transmission path 20 is recognized, and packet data is inserted into the unnecessary bit area and transmitted.

Therefore, by restoring and receiving the transmitted data based on the setting information on the receiving side, it is possible to perform data transmission utilizing the unnecessary focus area, and improve data transmission efficiency.

〔Example〕

FIG. 1 is a diagram showing the configuration of the transmitting device of the present invention, FIG. 3 is a diagram showing the configuration of the timing generation section in the transmitting device of the present invention, and FIG. 4 is a diagram showing the configuration of the transmitting device of the present invention. It is a figure showing operation. Further, FIG. 2 is a diagram showing the configuration of the receiving device of the present invention, and FIG. 5 is a diagram showing the operation of the receiving device of the present invention.

The transmitting device 10 in FIG. 1 includes a second delay section 11 . Audio/data presence/absence detection unit 12. Second delay section 139
Selection section 14. It has a multiplexing section 15 and a timing generation section 16 corresponding to the present invention. Further, the receiving device 30 in FIG. 2 includes a main separating section 31. Subseparator 32. It has a noise pattern generation section 33, a selection section 34, and a timing generation section 35 compatible with the present invention. Furthermore, the timing generation unit 16 on the transmitter side shown in FIG. 3 includes a data channel timing unit 161 and an identification bit timing unit 162.
and an AND circuit 163. The present invention will be explained in detail below using FIGS. 1 to 5.

First, in FIGS. 1, 3, and 4, audio/data is input to the audio/data presence detection section 12, and each CHI
〜1m shown in FIG. 4(a), where the level is "1' when audio/data is inserted into CH4, and the level is "O" when no audio/data is inserted.
Identification bits consisting of other bits to fourth identification bits (IDI to ID4) are sent to the timing generator 16. The identification bits (a) of "process" and "°0" are input to the data channel timing section 161 together with the setting information shown in FIG. The data channel insertion timing signal shown in Fig. 4 (C1) which becomes low at the timing of inserting packet data is generated. Also, the unnecessary bits of the 5th and 6th bits, which are blank parts of the identification bits, are set to 0. “The identification bit to be used as a level is input to the identification bit timing section 162 and the data channel timing section 161, and the identification bit timing section 162 recognizes it based on the setting information (b). Generates the unnecessary identification bit timing signal shown in Fig. 4 (dl) that is at the "Low" level. By doing this, it is possible to easily cope with the number of unnecessary identification bits that change depending on the setting of the transmission frame format. It is possible to insert packet data at the identification bit timing.The data channel insertion timing signal (C) and unnecessary identification bit timing signal (d) are
It is input to the ND circuit 163, and the logical product is taken and the result shown in FIG. 4 (e
), packet data is inserted in the multiplexer 15 during the "Low" level section of this timing signal (e), and the packet data is transmitted to the transmission line 20 as shown in FIG. 4(f). Compose it into a frame and send it.

On the receiving side, the received data shown in FIG. 5(a) from the transmission path 20 is input to the main separation unit 31, and first the identification pin (ID) shown in FIG. °1
” or “0°, 6-bit configuration data) and a data channel (CH).

Then, in the sub-separation unit 32, the data channel (CH) is separated into voice/data and packet data based on the identification bit (d), and the packet data is sent as is to the packet switch, while the voice/data is The selection section 34 inserts the noise pattern from the noise pattern generation section 33 into the channel corresponding to the Low' bit of the identification focus (d), and sends it out as audio data. In addition, the receiving side timing generation unit 35 generates a signal (C1) for separating packet data inserted into unnecessary identification bits based on the setting information (b) representing the number of channels in one frame, and generates a signal (C1) for separating packet data inserted into unnecessary identification bits. Separation unit 32 separates voice/data and packet data.In other words, sub-separation unit 32 separates IDI to ID4.
are treated as identification bits and sent to the selection unit 34 as ID5,
ID6 is treated as packet data, and each is sent to the packet switch.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, even when an unnecessary identification bit occurs due to the setting of the transmission frame format, the unnecessary identification bit is recognized and the packet is replaced with the unnecessary identification bit. Since data is inserted and sent to the transmission path, transmission efficiency can be improved.

4 is a diagram showing the operation of the transmitting device of the present invention, FIG. 5 is a diagram showing the operation of the receiving device of the present invention, and FIG. 6 is a diagram showing the configuration of the data transmission device. , FIG. 7 is a diagram showing the configuration of a transmission frame, FIG. 8 is a diagram showing the configuration of a conventional transmitting device, and FIG. 9 is a diagram showing the configuration of a conventional receiving device.

In the figure, 10 is a transmitting device; 16 is a timing generation unit; 20 is a transmission line; 30 is a receiving device; 35 is a timing generation unit; shows.

[Brief explanation of drawings]

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Claims (1)

[Claims] In a data transmission device that inserts packet data into a silent section of an audio signal or a section where no unpacketized data exists, there is When transmitting data at various transmission speeds, the sending side includes a timing generator (1) that is controlled by setting information that sets the format of the transmission frame on the transmission path (20) in advance.
6), recognizes unnecessary bits that occur when transmitting in integral multiples of the minimum unit on the transmission path (20) among the identification bits in the transmission frame, and inserts packet data into the area of the unnecessary bits. The high-efficiency multiplex transmission is characterized in that a timing generator (35) is provided on the receiving side to restore and receive the transmitted data, thereby improving the transmission efficiency of the transmitted and received data. method.