DE2535506A1 - Speech signal exchange by simultaneous operation - has three logic stages which each combine signals from and distribute them to two groups of stations - Google Patents

Abstract

The first logic stage combines first digital coded signals from a frist group of stations with second digital signals from a second group of stations. This stage output signal delivers data from the first and second group of stations. A second logic stage combines first signals with local digital signals, and its output signals are distributed to the second group of stations, and a third logic stage combines the second signals with first local signals, and its output signals are distributed to the first group. A switching circuit (80) is provided to synchronise the first two sets of digital coded signals.

Description

Method and device for assembling in digital form Information Displayed The present invention relates to a method of replacement digitally coded voice information between several transmission stations in simultaneous operation, and a method for assembling digitally encoded speech data. The present The invention also relates to transmission stations for exchanging voice information between the transmission stations in simultaneous operation and a device for receiving of data from a transmission station, as well as for entering data into a transmission station, and a transmission station for obtaining data signals from a transmission system, as well as for inputting data signals into a transmission system, and a transmission station for inputting digitally encoded data into a transmission system, as well as for extraction digitally coded data Data from a transmission system.

The present invention thus relates generally to the distribution of digital Information and especially systems in which multiple channels with digitally encoded Voice information can be put together for division via a transmission system. When the composite channels are decoded, the one contained in each of the channels Speech information essentially completely recovered.

The simultaneous transmission of several speech input signals via a distribution system was previously used in analog systems through a linear combination of the input signals. That way all the information remained of each speech input channel included in the split signals. When the input signals of the distribution system are encoded in digital form, the input channel signals cannot be combined linearly.

A method of distributing multiple channels that are digitally encoded Input channels are provided, is the multiplex method, in which the Input signals are transmitted in multiplex mode. The signal multiplex method is that an input signal is a certain interval in an interval sequence is assigned, the interval sequence being repeated over and over again. With this one Procedures are very accurate timer facilities are required to ensure that that the information in the assigned intervals across the entire distribution system is divided. In addition, the information contained in each channel becomes strong decreases as the number of channels increases. In addition to this fact and especially when the distribution system is in the context of voice information should be operated, usually relatively few channels work at the same time. This is why the multiplex method, with time intervals for special dere and are reserved for input channels that are only used to a limited extent, very ineffective will.

In digital systems, several speech input channels can be combined or linked1 by decoding the signal received from an input channel where the decoded signal and the speech information are combined in the input signal, the composite signal encoded in digital form and the digitally encoded composite Signal is divided through the distribution system. The input channels in an intermediate layer of the distribution system must, however, have the input information corresponding to the intermediate layer to the information that the remaining parts of the system transmit in two directions will.

In order for this system to work satisfactorily, it is therefore necessary: the coding and decoding devices to be provided twice, which means that much higher Costs arise and facilities become more complicated. In addition, increase and the errors in the signals are increased by the repeated encoding and Decode significantly.

The synchronization of several signals. of the input signals, which being controlled by different time bases in terms of timing continues to make it more difficult assembling digital information. Therefore, precautions must be taken provide a compatible time base for assembling digitally encoded signals.

The present invention is therefore based on the object of an improved To create a transmission system, as well as a better method for the transmission of to indicate the information available in digital form.

In connection therewith, the present invention also has in particular the task of transmitting multiple digital input signals via a single one To enable channel and several speech input signals represented in digital form to Ubertra - RunR compose the transmission via a digital transmission system, as well as creating a digital transmission system with which conversations can be carried out at the same time or conference calls can be held. It is in this context Another object of the invention is to transmit one out of several input channels to select the beginning of the digitally coded speech information via an output channel in one of several input channels and the signals of the input channel, in which just beforehand the speech information begins to feed an output channel.

This problem is solved by a method for exchanging digitally coded speech information between several transmission stations in simultaneous operation according to the invention The following procedural steps: Arranging the transmission stations in a specific Series; Transferring digitally coded voice information in this order in a first direction; Transferring digitally coded voice information in this Order in a second direction; Assemble the to one of the transmission stations arriving information with the information transmitted in the first direction, as well as with that transmitted in the second direction in this particular order Information; and retrieving information in each transmission station, wherein the information retrieved from in a first direction and in a second Direction transmitted information is composed.

The task is also provided by a method for assembling digitally coded speech information by the method steps specified in claim 11 solved.

The transmission stations for the exchange of voice information between the transmission stations in simultaneous operation solve the stated problem according to the invention in that each transmission station has the following circuit parts: A first Linking pins, the first digitally coded signals from a first first Group of transmission stations with second digitally coded signals from one second group composed of transmission stations, the output signals the first link level of this station data from the first and second group deliver from transmission stations; a second linkage stage, which is the first Signals composed of the digitally encoded local signals, the output signals the second linking stage of the distribution to the second group of transmission stations to serve; and a third link stage, which the second signals with the first composed of local signals, the output signals of the third link stage serve for distribution to the first group of transmission stations.

A device for receiving data from a transmission station, and for entering data into a transmission station, the object is achieved according to the invention by the features specified in claim 8.

The task mentioned is performed by a transmission station for extraction of data signals from a transmission system, as well as for inputting data signals in a transmission system according to the invention also by those specified in claim 13 Features solved.

Finally, the task according to the invention can still be carried out a transmission station for entering digitally coded data into a transmission system, as well as for obtaining digitally coded data from a transmission system according to the invention solve by the features specified in claim 17 and claim 20.

Thus, according to the invention, devices are used to solve the problems posed specified, which contain a predetermined state in several, digital information Determine input channels and the input channel, the the given state just before, a; Apply output signal. The specified conditions are selected so that a sufficiently good scan, or a sufficiently good sampling of each channel containing information is generated so that a substantial part of the information contained in each input channel transferred from the facility.

The device for assembling several input channels can do this are used, simultaneous calls between several stations of a transmission system to enable. A first facility in a station for composing signals sets the digitally encoded signals from the stations, which are related to the receiving station lie in a first transmission direction, with the digitally coded signals from the stations together, those relating to the receiving station in a second Transmission direction lie. The composite signal is fed to a decoder and through appropriate devices (e.g. loudspeakers for voice information) recovered in the station. A second device for assembling signals sets the signals from the stations lying in a first transmission direction with the digitally coded signals generated in the station and transmits the composite signal in the second transmission direction lying stations. In a corresponding manner, a third device is used for signal assembly the signals from the stations in the second transmission direction with the digitally encoded Signals that are generated at the station together and transmits the composite Signals to the stations in the first transmission direction.

Means are also provided to control the signals during assembly to synchronize so that the composite digital signals with the same Signal timing are transmitted.

the The invention thus provides a device and a method for assembling information presented in digital form, and in particular of digitally encoded audio information that is to be divided into a digital transmission system of several input data signals is received. When a predetermined digital sequence is detected in one of the input channels the device connects the channel having the predetermined state with the Transmission system until it is determined that the specified digital sequence in occurs on another channel. At this point the data channel that is currently previously has the predetermined data sequence connected to the transmission system and replaces the channel that was previously connected to the transmission system. if the information contained in the input channels from digitally coded voice data exists, the predefined state is the beginning of the information in the channel again and in this way determines the beginning of the information. Several, digitally coded Channels containing voice information can in this way be connected to the transmission system connected, with the transmission system sampled data from each active Channel receives fed. The gon recovery of the o eco outputs information the transmission system corresponds to the simultaneous or eonference reception of several Voice information channel 0.

The features, measures and advantages of the invention result also from the following descriptions of embodiments in connection with the claims and the drawings. They show: FIG. 1 a transmission station according to FIG a preferred embodiment of the invention in a schematic representation, Fig. Figure 2 is a block diagram of a signal combination stage used in the preferred Embodiment two digital input signals in a single output signal 3 shows a logic circuit in the 8 signal combination stage step of the preferred exemplary embodiment is used, FIG. 4 shows a logic combination circuit, those used in the signal combination stage of preferred embodiment 5 Fig. 5 is a schematic representation of a timing change stage that the Synchronization of the signal timing for the composite digital signals in The preferred exemplary embodiment is used, FIG. 6 shows a circuit representation with the circuit elements contained in the transmission station according to FIG 7 is a schematic representation of the transmission stations in a typical Transmission system.

In Fig. 1 there is a transmission station 100 according to the preferred one Embodiment of the invention shown schematically.

The transmission station receives first data input signals in a sequence of digital signals with one synchronized with first clock signals Time base are present, as well as second data input signals, which are in a sequence of digital Signals with a time base synchronized with second clock signals are present. The broadcast station receives audio input signals from a local one Operator and transmits audio output signals to a local operator.

The second data output signals of the transmission system are off the second data input signals and the audio input signals in digital form composed with a time base synchronized with the first clock signals and the first data output signals are selected from the first data input signals and the audio input signals in digital form with one with the second Clock signals synchronized time base composed. The audio output signals are supplied to a digital encoder 41 which converts sound information into digital form implements. The first clock signals are supplied to the digital encoder 41 and set the time base of the output signals nale of the digital encoder 41 fixed.

The first data input signals and the output signals of the encoder 41 and the first clock signals are fed to logic circuit 50 (b). the Output signals of the logic stage 50 (b), as well as the first clock signals and the second clock signals are applied to a timing change stage 80 (a). The output signals of the timing change stage 80 (a), the first data output signals are that of the second clock signals fixed time base.

The second data input signals, as well as the first clock signals and the second clock signals are applied to the timing change stage 80 (a). the Output signals of the timing change stage 80 (b), one of which is given by the first clock signals have a fixed time base, together with the output signals of the encoder 41 of the linkage stage 50 (a). The output signals of the logic level 50 (a) are the second data output signals with one through the first clock signals fixed time base.

The first data input signals and the output signals of the timing change stage 80 (b), together with the first timing signals from logic stage 50 (c) forwarded. The output signals of the logic stage 50 (c) and the first clock signals are fed to a digital decoder 42. The decoder 42 sets the in digital Information available in form into audio information available in analog form around.

The output signals of the decoder 42 are the on output signals.

A linking stage 50 is shown schematically in FIG. 2 shown, the multiple input signals in digital form (two of these Signals are shown) together or linked, which then via a transmission system be sent out. A first input signal and a second input signal Input signal are fed to the connections of an electronic switch 52. A compound Signal occurs at the output terminal of the electronic switch 52, the composite signal determined by the current switch position of the switch 52 is. The first input signal and the second input signal, as well as the time base the clock signal constituting the first and second input signals are applied to the input terminals an algorithmic decision stage 51 is supplied. The output of the algorithmic Decision stage 51 sets the switch position of the electronic switch 52 fixed, the switch position of the electronic switch 52 determining whether the first input signal or second input signal at the output of the electronic switch 52 occurs.

In Fig. 3, a logic circuit 60 is shown which is part of the algorithmic decision stage 51 is. According to the preferred embodiment the invention is an input signal at an input terminal of a D flip-flop 61 laid. A D-flip-flop causes a lying at the input of the flip-flop digital signal with a positive clock signal at an output of the flip-flop occurs. The way the D flip-flop works, as well as the way others work in the further still specified logic circuit components are in Digital Electronics for Scientists by H. V. Malmstadt and C. G. Enke, published by. A. Benjamin, Inc. New York, 1969, chap. 5, pages 179 to 229. The output of the D flip-flop 61 is connected to an input of a D flip-flop 62. The outcome of the D flip-flops 62 are connected to an input of a D flip-flop 62.

The flip-flops 61, 62 and 63 are connected to the clock signal input terminals a common clock signal. The outputs Q of the flip-flops 61, 62 and 63 are available connected to the inputs of a NAND gate 65, and the inverted outputs Q of the flip-flops 61, 62 and 63 are connected to the inputs of the NAND gate 64.

The outputs of the NAND gates 64 and 65 are connected to the inputs of the of NAND element 66 in connection. At the output of the NAND gate 66 is a decision signal provided that the simultaneous presence of in the flip-flops 61, 62 and 63 stored digital signals, and that of the logic circuit 60 The input signal provided is tapped at the output Q of the flip-flop 63.

In Fig. 4 is a logic combination circuit 70 which is part of the electronic switch 52 is shown schematically.

At the J-terminal of a J-K "flip-flop 71 there is a first, of one first logic circuit 60 provided decision signal to and at the E-terminal is a second decision signal coming from the second logic circuit 60 at. A clock signal is applied to the control terminal of the "J-E" flip-flop 71. Of the "J-E'I flip-flop is described by Malmstadt et al. In the reference cited above described in detail and can be summarized as follows.

If there is a positive clock signal, a logic signal occurs at output Q Signal that (a) does not change when on both the J and the K-Terminal negative logic signals are present, (b) which is converted into an inverted logic signal passes over if positive logic signals are present at both the J and E terminals are present, and (c) that in all other cases is the logical signal that at the entrance. The output Q of the "J-K" flip-flop 71 is connected to the first input of the NAND gate 72 in connection and at the second input of the NAND gate 72 the first input signal. The inverted signal on the bracket% of the "J-g" flip-flop 71 is fed to the first input of a NAND gate 73, and to the second input of the NAND gate 73 is the second input signal. The output signal of the NAND gate 72 and the output signal of the NAND gate 73 are the input terminals of a NAND gate 74 forwarded. The output of the NAND gate 74 is the composite Signal.

A timing change stage 80 is shown schematically in FIG. 5 depiction reproduced, which changes the clock of a digital follow-up signal. The one for the measure one signal synchronous data input signals are fed to an input of a D flip-flop 81. The clock two signals are, however, applied to the clock input of the flip-flop 81. The output of the D flip-flop 81 is connected to one input of the electronic switch 83 connected, and the data input signals are fed to a second input of the electronic Switch 83 supplied. The clock one signals and the act two signals become one Phase detector 82 supplied for the timing change, and the output signals from Detector 82 determine the position of the electronic switch 83. At one output of switch 83 has the data output signals which lead to the clock two signals are in sync. In the timing change stage, the data input signals are used as Data output signals issued, namely when the at the input of the D flip-flop pending logic signals when there are clock two signals at the output of the D flip-flop. For transitions, however, if the clock one signals and the clock two signals are nearly in phase, the phase detector 82 for the Time clock change the data input signals via the electronic switch 83 as Data output signals through when the clock one signals and the clock two signals are practically in phase.

In Fig. 6, the transmission station 100 is in accordance with the preferred embodiment the invention presented in more detail. The first data input signals are applied to logic circuit 60 (a). The first data input signals and the first decision signals provided by logic circuit 60 (a) become a logic combination circuit 70 (a) and a logic combination circuit 70 (c) supplied.

The audio input signals are a digital encoder 41 together with supplied to the first clock signals, which serve as clock signals for the encoder 41. The output signals of the digital encoder 41 41 become logical Circuit 60 (c) out. The sound input signals and the sound decision signals become the logic gating circuit 70 (a) and the logic gating circuit 70 (b) supplied. The second data input signals and those from the logic circuit 60 (b) provided second data decision signals reach the logical Gating circuit 70 (b) and to the logic gating circuit 70 (c). At the clock inputs of the logic circuit 60 (a), 60 (b) and 60 (c) and the logic Gating circuits 70 (a), 70 (b) and 70 (c) are present first clock signals, the are inverted by an inverting amplifier 26.

The signals generated by logic gating circuit 70 (a) arrive at an input of a D flip-flop 91. At the clock input of the flip-flop 91 the first clock signals are present. Terminal Q for the inverted output signal of the flip-flop 91 is connected to the timing change stage 80.

The signals generated by logic gating circuit 70 (b) arrive at an input of the D flip-flop 93. The output n for the inverted The output signal of the flip-flop 93 is connected to an input of the inverting amplifier 99 connected. The second clock signal is present at the clock input of the flip-flop 93. the Output signals from amplifier 99 are the second data output signals.

The signals generated by logic gating circuit 70 (c) are fed to the digital decoder 42, at whose clock input the first clock signals be created. The output signals of the decoder 42 are the audio output signals.

The terminal% for the inverted output signal of the flip-flop 91 stands with a terminal of the electronic switch 83 (a) and an input terminal of the D flip-flop 81 (a) in connection.

The second clock signals are present at the clock input of flip-flop 81 (a). The output terminal Q for the inverted output signal of the of Flip-flops 81 yes) is connected to the wide input terminal of the electronic switch 83 (a). The output of the electronic switch 83 (a) is connected to an input of the inverting amplifier 98 in connection. Step at the output of amplifier 98 the first data output signals.

The second data input signals are a first input of the electronic Switch 83 (b) and a first input of the D flip-flop 81 (b). At the The clock input of the flip-flop 81 is the first clock signals. The output terminal Q for the inverted output signals of the flip-flop 81 (b) is associated with a second Input of electronic switch 83 (b) in connection. The output of the electronic Switch 83 (b) is connected to one input of the manual switch 25. An output of the Hand switch 25 is connected to logic circuit 60 (b). A second entrance of the hand switch 25 is connected to an output of the “J-K” flip-flop 95. At the Clock input of the flip-flop 95 are the integrated first clock signals and the positive logic signals are fed to the J and input.

The timing change phase detector 82 is the preferred one Embodiment consisting of monostable multivibrators 85 and 86 and a coincidence detector 87. The first clock signals and the second clock signals are applied to the multivibrator 85 are fed to the multivibrator 86. Occurs at the entrance of one of the two multivibrators a positive clock signal occurs at the output of the receiving clock signal Multivibrators emit a 75 nanosecond pulse. The output terminals of the multivibrators are connected to the input terminals of the coincidence detector 87. If the both multivibrators have overlapping output signal pulses, whereby is reproduced that the first clock signals and the second clock signals practical occur simultaneously, the output of the detector 87 causes the electronic switch 83 (b) provides a positive transmission input signal directly, without one a timing change occurs that occurs when passing caused by the associated D flip-flops.

In Fig. 7 is a transmission system which is described here Has facilities, shown schematically. The transmission station 100 is used the local reception and the local transmission of information about the entire transmission system is to be distributed. The stations are 100 Interconnected via intermediate stations. As an intermediate station, for example a microwave station can be provided. In transmission technology, however, it is also known to use other intermediate stations.

The first data (input and output) signals are in the transmission system in one direction and the second data (input and output) signals transmitted in the opposite direction. In the preferred embodiment are received by the next transmission station and sent out by it Signals synchronized using time base signals. However, other synchronization methods can also be used and facilities are used. In the preferred embodiment the clock signals are recovered from the corresponding transmitted data. However facilities can also be provided to allow a direct between the stations Exchange of clock signals to ensure synchronization. Swap the transmission stations located at the end points of the transmission system Data with only one neighboring station 100 at a time.

The following describes the application of the preferred exemplary embodiment to be discribed.

In the preferred embodiment, the digital data transmitted in an NRZ form (non-return-to-zero format).

In this form of the digital signals, the positive logical ones lie Signals in the form of positive voltage signals and the negative logic signals in a waveform that is essentially essentially a zero voltage having. With this type of digital transmission, two consecutive positive logic signals are not separated by changing the positive voltage level. Therefore it is necessary to provide a time base so that it is repetitive logical Signals can be separated from each other.

In the preferred embodiment, the digital encoder and decoder the so-called continuously controllable delta-flodulation (Continuously Variable slope delta modulation; abbreviated CVSD). According to this type of modulation the digital output signal is changed adaptively by modulating the audio signal. When a CVSD signal is received, the binary input signals are reversed by a Process converted into sound signals. For CVSD modulation of audio input signals occurs when data is transmitted without any information contained therein of logical signals based on alternating between positive logical signals and negative logic signals. The beginning of a transfer of information is indicated in this transmission system by the fact that three consecutive positive logic signals or three consecutive negative logic signals appear. Therefore, in the preferred embodiment, the logic circuits are 60 (a), 60 (b) and 60 (c) designed so that they are submitting these orders determine logical signals. If one of these orders is found, more logical Signals, a decision signal (which is formed as an interrupt request signal can be) delivered and controls a logic circuit in such a way that the logical signals of an output terminal representing the beginning of the information the transmission station are transmitted. If therefore from two input channels Information occurs in the system, the logic combination switches between the two channels back and forth. In the special application form according to the invention, d. H. in the presence of voice information, however, there is a very high level of redundancy the information, as well as time periods Periods in which the encoder no output signals generated. In addition, the ear has the physiological property that the composition and recovery is the sample property of the received Speech information "smooths". As a result, it is in the present invention possible, several voice information channels (e.g. for conferences with several Participants) without the information content being noticeably lost. So different conversations can be held at the same time in the same transmission system appear. Of course, as the number of channels used increases, they increase also the information loss and the quality of the information received accordingly worse. In the practical case it is of course very rare that that there is constant talk at different stations, if there is a continuous one There is a transmission from another station. For the sake of courtesy or When it comes to insight, several operators are usually disciplined in exchanging information show even if the individual speakers speak quickly. The appearance of three identical logic signals as provided in the preferred embodiment is just one of several possible signal combinations for identification. As is known to the person skilled in the art, other signal combinations can also be used for the Switching the audio channels can be used. Especially when there are digital noise or interference signals are present in the transmission system, show three identical, consecutive logical signals normally do not indicate the beginning of the information transmission and accordingly, they cannot be determined either. If digital Interfering signals it is possible not only the occurrence, but also the ratio the occurrence of special signal combinations to determine the occurrence of interrupted ones To reduce decision signals generated by the interfering signals.

At the station according to the principles of the present invention three linkage levels are provided. The data from a one first direction are combined with aen data from a second direction, so that this transmission station provides a sound output signal. The data from one direction with the audio input signals of the transmission station linked and transmitted in the original direction in the transmission system. In the data from the second direction are correspondingly combined with the audio input signals Linked and transmitted in the first direction of the transmission system.

To ensure that all transmissions are on the transmission line subject to the same time base, a separate channel can be used to define the time base be provided. In the preferred embodiment, however, the clock signals, that time the data signals, typically slightly different. It it is therefore necessary to have clock change stages at various points in the transmission system to be provided.

In the preferred embodiment, the time base change is made using of a D flip-flop, the second clock signals of the desired time base be fed to the control input of the D flip-flop. In the event that the two Time bases practically in phase can be equalizing or transient processes occur in the logic circuits that lead to incorrect data. With the preferred one Embodiment, therefore, the timing change stage only transmits the data via the electronic switch, if the two time bases are essentially at the same time, d. H. in the preferred embodiment, when the timing pulses are in a period of time of 75 nanoseconds. Due to the redundancy in the language information is the loss of a random logic B during the operation of the timing change stage insignificant.

When the preferred embodiment is used, the switch acts 25 of the station 100 in such a way that the station is either used as a normal station for the Transmission or serves as the end station of a transmission system. Works the station 100 as the end of the line End station, so the flip-flop 95 sets a Sequence of signals with the first timing base ready, in which positive and alternate negative logic signals and create a channel with no information in the CVSD modulation technique.

The idea of the invention is not limited to that described above and in its mode of operation explained preferred embodiment of the invention is limited. Many changes and modifications are possible for the person skilled in the art without this thereby the inventive idea would be abandoned.

Patent claims:

Claims (20)

P a t e n t r a n s p r ü c h e 1. Transfer stations for exchange of voice information between the transmission stations in simultaneous operation, d a it is noted that each transmission station (100) has the following Circuit parts have: a first logic stage, the first digitally coded Signals from a first group of transmission stations with second digitally encoded Signals from a second group of transmission stations composed, wherein the output signals of the first link level of this station data from the first and provide second group of transmission stations; a second link level, which combines the first signals with the digitally coded local signals, wherein the output signals of the second link stage of the distribution to the second Serve group of transmission stations; and a third link level, the composes the second signals with the first local signals, the output signals the third linking stage of the distribution to the first group of transmission stations to serve. 2. Transmission station according to claim 1, characterized in that Circuit parts (80) for synchronizing the first and second digitally coded Signals are provided. 3. Transmission station according to one of claims 1 and 2, characterized in that that encoder (41) for coding the local signals, and decoder (42) for Decoding of the output signals from the second logic stage are provided. 4. Transmission station according to one of claims 1 to 4, characterized in that that each link stage has the following circuit parts: a switch (52), in a first switch position, a first input signal to a switch output terminal and in a second switch position, a second input signal to the switch output terminal leads; a first identification stage (51) which has a predetermined state in identifies the first input signal and, when it is identified, the switch (52) brings it into the first switch position; and a second stage of identification (51), which identifies a predetermined state in the second input signal and when it is identified, move the switch (52) to the second switch position (Fig. 2). 5. Transmission station according to one of claims 1 to 4, in particular according to claim 4, characterized in that each identification stage (51) several Storage elements (61, 62 and 63) for storing digital data, as well as circuit elements (64, 65, 66) to identify a simultaneous storage of the specified logic signals in the storage elements (64, 65, 66) (Fig. 3) 6. Transmission station according to at least one of claims 1 to 5, characterized in that the switch (52) has the following switch parts: A logic circuit part (71), which is a supplies first logic signal to a first output terminal (Q) if at a first Input clamp (J) of the logic circuit part (71) applies a signal, and one second output terminal (Q) transmits a second logic signal if a second Input terminal (K) applies a signal; a first link (72) whose first input terminal with the first output (Q) of the logic circuit part (71) is connected, and at its second input terminal the first input signals invest; and a second link (73), the first Input terminal connected to the second output terminal (Q) of the logic circuit part (71) and second input signals are present at a second input terminal (FIG. 4). 7. transmission station according to at least one of claims 1 to 6, in particular according to claim 2, characterized in that the signal synchronization device (80) has the following circuit parts: A logic circuit element (81), on whose one input terminal (D) applies a first digital signal, which with first Clock signals are to be synchronized, with the control terminal of the logical Circuit element (81) the second clock signals are present; a switch (83), which in a first switch position sends the first digital signal to an output terminal leads and in a second switch position the output terminal (Q) of the logical Circuit element (81) connects to the switch output terminal; and a detector circuit (82) showing the occurrence of the first clock signals and the second clock signals within a predetermined period of time and causes the switch to then is in a second switch position (Fig. 5). 8. device for receiving data from a transmission station, and for entering data into a transmission station, characterized by the following Circuit parts: A first synchronization circuit, the second digitally coded Data signals synchronized with first clock signals; a first linkage stage, which the output signals from the first synchronization circuit with the first digitally encoded data signals, a decoder, which the output signals the first signal combination stage decodes; a second signal linkage stage, which the output signals of the first synchronizing circuit with the output signal composing the encoder; a third signal combination stage, which the output signals of the encoder with the first digitally encoded data signals composed; and a second synchronizing circuit that receives a selected output signal of the Output signals from the second signal linking stage with the second act signals synchronized. 9. Method for exchanging digitally coded speech information between several transmission stations in simultaneous operation, characterized by the following Method steps: arranging the transmission stations in a specific order; Transmitting digitally encoded speech information in this order in a first one Direction; Transferring digitally coded voice information in this order in a second direction; Assemble the arriving at one of the transmission stations Information with the information transmitted in the first direction, as well as with the information transmitted in the second direction in that particular order; and retrieving information in each transmission station, the retrieved Information from that transmitted in a first direction and in a second direction Information is composed. 10. A method for recovering thongs according to claim 9, characterized in characterized in that the assembly of information from the following process steps consists: Establishing -a given state in a first and in a second digitally encoded signal channel; and transferring information in a signal channel, in which the specified condition was determined. 11. A method for assembling digitally encoded speech data, characterized through the following process steps: a. Establishing an information status in a first channel containing digitally encoded speech data; b. Transferred the Data of the first channel into an output Signal channel after it has been determined that the information state occurs in the first channel; c. Determine of the information status in a second containing digitally coded speech data Channel; d. Transferring the data in the second channel to an output signal channel Determining that the information condition occurs on the second channel; and e. Repeat of process steps a to d. 12. Method for assembling digitally encoded speech information according to claim 11, characterized in that in process step a the beginning the voice information in the first channel and the beginning of the process step c Voice information is detected in the second channel. 13. Transmission station for obtaining data signals from one Transmission system, as well as for the input of data signals into a transmission system, characterized by the following circuit parts: a first logic circuit (60a), when a predetermined state is determined in the case of the first digitally coded Provides a first decision signal to data signals; a second logic circuit (60b), which when the predetermined state is determined in the second digitally coded Provides a second decision signal to data signals; a third logic circuit (60c) when the predetermined state is determined in the local data input signals provides a third decision signal; a first logic circuit (70a), the first data signals as a function of the first decision signal and the second Lets data signals as a function of the second decision signal and the from the first logic circuit (70a) passed signals the output signals represent the transmission station; a second logic circuit (70b) which the first data signals as a function of the first decision signals and the local input signals depending on the third Decision signal passes through, with those passed by the second logic circuit (70b) Signals represent first data output signals; and a third logic circuit (70c), the second data signals as a function of the second decision signal and lets through local input signals as a function of the third decision signal, wherein the signals passed by the third combination circuit (70c) are second Data output signals are (Fig. 6). 14. Transmission station according to claim 13, characterized by a Encoder (41) which converts the local data input signals into digital form, and by a decoder (42), the digitally coded output signals of the transmission station decoded (Fig. 6). 15. Transmission station according to claim 13 or 14, characterized in that that the transmission system from this transmission station, a first group consists of transmission stations and a second group of transmission stations, wherein the first input signals are signals from the first group of transmission stations, the first output signals signals from the second group of transmission stations, the first output signals signals from the second group of transmission stations, the second output signals from the second group of transmission stations and the second output signals are signals from the first group of transmission stations contain. 16. Transmission station according to one of claims 13 to 15, characterized by synchronizing devices for synchronizing the second input signals with first clock signals and by synchronizing devices for synchronizing of a selected signal d @@ first and second output signals with specified @ n Clock signals. 17. Transmission station for entering digitally encoded data into a Transmission system, as well as for obtaining digitally coded data from a transmission system, characterized by a first link stage which the first digitally encoded Combined input data signals with the local, digitally coded input signals and provides first output signals and the signals from one of the first data signals and which transmits input signals which just previously had a predetermined data state have, through a linkage stage, the second digitally coded input data signals and assemble the local input signals and provide a second output signal, and signals from one of the second data input signals and the local input signals transmits that just before have the specified data status, and through a third link stage which the second data input signals and the first Assembles data input signals and provides the transmission station information. 18. Transmission station according to claim 17, characterized in that that the predefined state is the beginning of the language information. 19. Transmission station according to claim 17 or 18, characterized in that that the signals are continuously adjustable delta modulation of the speech information exhibit. 20. Transmission station for entering digitally encoded data into a Transmission system, as well as for obtaining digitally coded data from a transmission system, characterized by a first link stage for assembling first input data signals, which signals from one of the first data signals and the input signals, as well as which provides input signals indicative of a predetermined condition; through a second Linking stage, which the second input data signals and the local input signals composed and provides a second output signal and signals of one of the second data input signals and the local input signals that show the given state, delivers, and through a third link level, which composes the second input data signals and the first data input signals and providing information to the transmission station, the signals being continuous contain adjustable delta modulation of the speech information and three consecutive identical logical signals indicate the beginning of the speech information in a signal channel determine. 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