JP2000188610A - Packet transmission system for voice signal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily attain packet transmission of a push-to-talk type voice signal by having only to provide a minimum function to an existing voice signal transmitter. SOLUTION: A voice signal processing section 11 converts a voice signal A1 given to a transmission section 1 into a voice packet A2. An ear and mouth E/M control signal exclusive packet processing section 13 converts an E/M control signal B1 into an E/M control signal packet B2. The E/M control signal exclusive packet processing section 13 generates change information 1, 0 in response to the high, low level of the E/M control signal and assembles them into packets as an E/M flag B3 that is identified from an E/M control signal packet B2 and it is added to an identification header B4. A packet processing section 21 of a reception section 3 distributes the voice packet A2 and the E/M control signal packet B2 on the basis of the E/M flag B3 and a voice signal conversion processing section 33 converts the voice signal packet A2 into the original voice signal A1, an E/M control signal conversion processing section 35 converts the E/M control signal packet B2 into an analog signal, on the basis of the change information 1, 0 and the analog signal is converted into the original E/M control signal B1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice signal packet transmission system, and more particularly to a push-to-talk type voice signal packet transmission system.

[0002]

2. Description of the Related Art A so-called packet transmission system, in which a plurality of signals are packetized and interrupted and transmitted on the same signal line, is widely used. For example, JP-A-8-107417
Japanese Patent Application Laid-Open Publication No. H11-163,003 discloses a technique of separating a voice signal (immediate system signal) from a telephone or the like, a data signal (standby system signal) from a computer or the like, and a control signal for controlling these signals, and performing packet transmission. I have. In this technique, information recording the priority and quality class for each packet type is attached to a packet signal and transmitted, thereby ensuring the immediacy and latency of each signal. This is a technique for efficiently transmitting a signal without causing quality deterioration.

[0003]

The above-mentioned technique separates an audio signal which always performs two-way communication, such as a telephone, and a control signal having control information relating to the audio signal, and transmits these signals by packet transmission. Is what you do. That is, this is a technique corresponding to packet transmission of a normal audio signal. However, packet transmission technology is not yet available for so-called push-to-talk type voice signals that transmit only when the push button is pressed or transmit only in the direction in which the control flag is raised in wireless communication. Not disclosed.

[0004] The present invention has been made in view of such circumstances, and an object of the present invention is to provide a push-to-talk type audio signal easily by adding a minimum function to an existing audio signal transmission device. Another object of the present invention is to provide an audio signal packet transmission system which enables packet transmission.

[0005]

According to the present invention, an audio signal packet transmission system is provided with an E & M (Ear-Mear) (E & M) for an existing audio signal transmission apparatus.
& Mouth) By adding the control signal processing part,
It is characterized in that a push-to-talk type voice signal can be transmitted as a packet. That is, as a transmission method of a push-to-talk type voice signal in packet transmission,
In order to enable the packet transmission of the voice signal with the E & M control signal, means for transmitting the E & M control signal as a dedicated packet is provided.

That is, according to a first aspect of the present invention, there is provided a packet transmission system for an audio signal in a push-to-talk type transceiver, which packetizes an audio signal with an E & M control signal and transmits the packet as a wireless packet. Voice packet generating means for packetizing a signal to generate a voice packet; E & M control signal dedicated packet generating means for packetizing an E & M control signal to generate a dedicated E & M control signal packet; and a voice packet and a dedicated E & M control signal packet. Packet distribution means for receiving and distributing these, audio signal conversion means for converting the distributed audio packets to audio signals, and E & M control signal conversion means for converting the allocated E & M control signal dedicated packets to E & M control signals. Audio and E & M control signal dedicated packets from audio signals with E & M control signals Separating generated, and the voice packet and the E & M control signals dedicated packet, individually, is converted into a voice signal and E & M control signals, E
It is transmitted as an audio signal with & M control signal.

According to a second aspect of the present invention, there is provided a packet transmission system for an audio signal, wherein the E & M
The control signal dedicated packet generation means converts the analog signal level of the E & M control signal into change information of the digital signal, and packetizes the change information, and attaches an identification code for identifying the E & M control signal dedicated packet. The packet distribution unit distributes the voice packet to the voice signal conversion unit based on the identification code, and performs E & M
The control signal dedicated packet is distributed to the E & M control signal conversion means, and the E & M control signal conversion means converts the E & M control signal dedicated packet into an analog signal level E & M control signal based on digital signal change information. .

According to a third aspect of the present invention, there is provided a packet transmission system for an audio signal, wherein the E & M
When the analog signal level of the E & M control signal changes from High to Low, the control signal dedicated packet generation means generates information of the digital logic signal “0”, and the analog signal level of the E & M control signal changes from Low to High. In this case, the information of the digital logic signal "1" is generated, and the change information is packetized.
Reads the change information of the digital logic signal of the & M control signal dedicated packet, and when the digital logic signal is “0”, changes the analog signal level of the E & M control signal from High to Low. When the digital logic signal is “1”, It is characterized in that the analog signal level of the E & M control signal is changed from Low to High. According to a fourth aspect of the present invention, in the packet transmission system according to the third aspect, the identification code attached by the E & M control signal dedicated packet generation unit is attached to an identification header of the E & M control signal packet. A packetized E & M flag.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a voice signal packet transmission system according to the present invention. FIG. 1 is a block diagram showing a packet transmission method of an audio signal according to an embodiment of the present invention.
First, the configuration shown in FIG. The configuration of this transmission system is such that an E & M
The control signal dedicated packet processing unit 13 is provided, and the receiving unit 3 is provided with an E & M control signal conversion processing unit 35 for converting the dedicated packet into an original E & M control signal.

That is, the signal input to the push-to-talk type transceiver controls the 4W analog audio signal A1 and the signal direction for transmitting (Mouth = M) or receiving (Ear = E) the signal. And an E & M control signal B 1, which is input to the transmission unit 1. The transmitting unit 1 includes an audio signal processing unit 11 and an E & M control signal dedicated bucket processing unit 1.
3 is provided.

The audio signal processing section 11 has a function of generating an audio bucket A2 from the audio signal A1 by a normal bucket conversion process. On the other hand, the E & M control signal dedicated packet processing unit 13 performs bucket processing on the E & M control signal B1 to generate an E & M control signal bucket B2, and changes the change information according to the High and Low of the E & M control signal B1. "0" when low, "" when low-> high
It has a function of converting the change information "1" and "0" into packets, and an E & M flag B3 that can be identified as a dedicated packet of the E & M control signal B1 and an identification header B4. It also has the function of attaching to

The receiving section 3 includes a packet processing section 31, an audio signal conversion processing section 33, and an E & M control signal conversion processing section 35. The packet processing unit 31 has a function of distributing the received audio signal packet A2 and the E & M control signal packet B2 to the respective processing units. The audio signal conversion processing unit 33 converts the allocated audio bucket A2 into the original It has a function of converting it into a 4W analog audio signal A1. Further, the E & M control signal conversion processing unit 35 changes the change information “0”, “0” from the sorted E & M control signal packet B2.
The data of "1" is read, and if "0", the analog signal is changed from Hihg-> Low. If "1", the analog signal is changed from Low-> High, and the E & M control signal packet B2 is converted to the original. It has a function of converting it into an E & M control signal B1.

Next, the operation of the embodiment of the present invention will be described. As is clear from the figure, the audio signal A1 and the E & M control signal B1 are separately processed in the transmission source device (the transmission unit 1), and separate packets, that is, the audio bucket A2 and the E & M control signal packet B2 are generated. You. At this time, the identification code is attached to the E & M control signal packet B2 among the separately generated packets so that the E & M control signal packet B2 can be separately processed by the destination device. On the other hand, the voice packet A2 is generated by existing packetization processing. Then, both the voice bucket A2 and the E & M control signal packet B2 are transmitted to the receiving device (receiving unit 3). In the transmission of the E & M control signal packet B2, the E & M control signal B
When one signal changes between High and Low, change information for indicating the change is also transmitted in a packet at the same time. Then, the change information is read in the receiving device (receiving unit 3), and the E & M control signal packet B2 is converted into an E & M control signal B1 of a high and low analog signal.

Further, the operation of this embodiment will be described in detail. The analog audio signal A1 input to the transmission unit 1 is converted by the audio signal processing unit 11 into an audio packet A2 by packet processing generally performed. On the other hand, the E & M control signal B1
Is converted into an E & M control signal packet B2 by the E & M control signal dedicated packet processing unit 13. Further, the E & M control signal dedicated packet processing unit 13 outputs the H of the E & M control signal B1.
Generates change information according to igh and low. That is, E & M
"0" when the control signal B1 changes from High to Low
In addition, the information which becomes "1" when changing from Low- to High is generated. The change information “0” and “1” are packetized and attached to the identification header B4 as an E & M flag B3 that can be identified from the E & M control signal packet B2.

The voice packet A2 and the E & M control signal packet B2 having the E & M flag B3 attached to the identification header B4 are both transmitted to the receiving unit 3. In the receiving unit 3, the packet processing unit 31 transmits the E & M control signal packet B2.
E & M flag B3 attached to the part of the identification header B4
, The E & M control signal packet B2 is identified, and the audio signal packet A2 and the E & M control signal packet B2 are distributed to the respective processing units.

The audio signal packet A2 sorted in this manner is converted by the audio signal conversion processing section 33 into the original analog audio signal A1 by a generally used conversion processing method. Meanwhile, the allocated E & M
Regarding the control signal packet B2, the data of the conversion information “0”, “1” is read by the E & M control signal conversion processing unit 35, and if it is “0”, the analog signal is changed from Hihg-> Low, If "1", the analog signal is changed from Low-> High, and the original E & M control signal B1 is generated and output. In this way, by adding an E & M control signal processing function while utilizing existing audio signal processing, it is possible to perform packet transmission of a push-to-talk type audio signal with an E & M control signal.

The embodiment described above is an example for describing the present invention, and the present invention is not limited to the above-described embodiment, and various modifications are possible within the scope of the invention. is there. For example, in this embodiment, Push-to-talk
Although the transmission method of the type audio signal has been described, it is needless to say that the present invention can also be applied to a transmission method in which data is alternately communicated by a computer or the like.

[0018]

As described above, according to the audio signal packet transmission method of the present invention, the E & M control signal processing is added while utilizing the existing audio signal processing.
Packet transmission of Push-to-talk type voice signal with & M control signal can be performed. Therefore, the packet transmission device of the push-to-talk type E & M voice signal can be easily transmitted by diverting the existing voice signal packet transmission device and adding the processing part of the E & M control signal. .

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a packet transmission method for an audio signal according to an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Transmission part, 11 ... Audio signal processing part, 13 ... E & M control signal dedicated packet processing part, 3 ... Reception part, 31 ... Packet processing part, 33 ... Audio signal conversion processing part, 35 ... E & M control signal conversion processing part, A1: analog audio signal, A2: audio packet, B1: E & M control signal, B2: E & M control signal packet, B3: E & M flag, B4: identification header

Claims (4)

[Claims] 1. An audio signal packet transmission method in a push-to-talk type transceiver for packetizing an audio signal with an E & M control signal and transmitting the packet as a wireless packet, wherein the audio signal is packetized to generate an audio packet. Voice packet generating means, E & M control signal dedicated packet generating means for packetizing the E & M control signal to generate an E & M control signal dedicated packet, receiving the voice packet and the E & M control signal dedicated packet, and distributing them Packet distributing means, voice signal converting means for converting the distributed voice packet into the voice signal, and transmitting the distributed E & M control signal dedicated packet to the E & M
E & M control signal conversion means for converting into a control signal, from the voice signal with the E & M control signal, the voice packet and the E & M control signal dedicated packet are generated separately separately, and the voice packet and the E & M The control signal dedicated packet is a packet transmission method for an audio signal, which is individually converted into the audio signal and the E & M control signal, and then transmitted as the audio signal with the E & M control signal. 2. The E & M control signal dedicated packet generating means converts an analog signal level of the E & M control signal into change information of a digital signal, and packetizes the change information to convert the E & M control signal dedicated packet. A function of attaching an identification code for identification, the packet distribution means distributes the audio packet to the audio signal conversion means based on the identification code, and transmits the E & M control signal dedicated packet to the E & M control signal. 2. The E & M control signal conversion unit, wherein the E & M control signal conversion unit converts the E & M control signal dedicated packet into an analog signal level E & M control signal based on the change information of the digital signal. Packet transmission method for audio signals. 3. The E & M control signal dedicated packet generation means generates change information of a digital logic signal “0” when the analog signal level of the E & M control signal changes from High to Low, Signal level is Low to Hi
When it changes to gh, the change information of the digital logic signal "1" is generated, and the change information is packetized. The E & M control signal conversion means converts the change information of the digital logic signal of the E & M control signal dedicated packet. When the digital logic signal is "0", the analog signal level of the E & M control signal is changed from High to Low. When the digital logic signal is "1", the analog signal level of the E & M control signal is changed from Low. 3. The audio signal packet transmission method according to claim 2, wherein the signal is changed to High. 4. The E & M control signal packet-specific packet generating means according to claim 3, wherein said identification code is a packetized E & M flag attached to an identification header of said E & M control signal packet. Packet transmission method of the described audio signal.