JP2002261862A - Coding/decoding communication method and equipment thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a voice communication with high quality according to the result of reserving a plurality of communication channels when making a high speed communication using a plurality of communication channels. SOLUTION: In a communication channel reserving phase 311, a communication terminals on an originator side and an receiver side perform call-setting by a communication channel reserving process in a communication network. In a subsequent communication speed confirming/coding pattern determining phase S12, after the communication channel shifts to a communication state by the phase S11, the number of the communication channels reserved by the terminals on the originator side and the receiver side is confirmed, and a coding pattern is determined based on the confirmation of the number of the communication channels. In a communication phase S13 thereafter, a coding/decoding a communication process is performed to match a communication speed based on the result of determining the coding pattern, and a voice communication is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coding / decoding communication method and a coding / decoding communication apparatus for performing communication by voice coding / decoding with a variable transmission band to be coded corresponding to a communication speed. .

[0002]

2. Description of the Related Art Conventionally, as a transmission system for voice communication using a communication channel of a low communication speed (a logical communication line in time division multiplexing or the like) (for example, communication channel transmission in a narrow transmission band in mobile communication), narrow transmission is used. Band (N) -CDM
Communication speed of 9600 bps by A or PDC / TDMA is implemented. On the other hand, as transmission over a relatively wide transmission band, communication using a data amount of a codec / PCM encoding method with a sampling frequency of 8 kHz, such as a fixed network telephone network (ISDN, etc.), for example, 64 Kbps
Communication at the communication speed of

In this PDC transmission system, audio processing such as selective extraction of a transmission band corresponding to a frequency close to the real voice is performed in order to improve speech voice characteristics by various coding systems. In this transmission method, for example, in music data transmission in a wide frequency band such as music, sound quality is likely to deteriorate. That is, the transmission band of a transmission path between a communication terminal and a communication node (for example, a mobile terminal and a cell base station) is narrow, and communication in a wide transmission band cannot be performed.

As a method for realizing high-speed data communication by improving this, a plurality of communication channels (logical communication lines) are used at the same time, the apparent communication speed is expanded, and digital data is divided into packet units. There is a transmission method.

FIG. 8 is a diagram for explaining the relationship between the frequency spread distribution and the transmission bandwidth depending on the number of communication channels in the conventional voice information communication. In this example, the conventional communication speed is expanded to divide digital data into packet units.
4 shows the relationship between the frequency spread distribution of audio information and the accommodated transmission bandwidth depending on the number of communication channels in the MA transmission system. The transmission method shown in FIG. 8 means that the transmission band is expanded, the communication speed can be increased, and higher-quality voice communication can be performed.

[0008] In the transmission system showing the relationship shown in FIG. 8, a special transmission process for expanding the communication speed and dividing digital data into packet units is required in a communication network when setting up a call. That is, the communication channel between the communication terminal and the communication node is secured by the individual operations of the communication terminals on the calling side and the called side. In other words, there is no guarantee that the numbers of communication channels secured between the calling communication terminal, the called communication terminal, and the communication node always match.

For this reason, it is necessary to determine a sampling rate and a processing pattern for encoding and decoding so as to match the maximum communication speed (throughput) between end and end. In this case, if the encoding is performed based only on the information of the own communication terminal without knowing the maximum communication speed secured by the other communication terminal, a predetermined communication speed cannot be obtained.
Normal decoding cannot be performed.

As a conventional example of such high-quality voice communication transmission, for example, Japanese Patent Application Laid-Open No. 2000-132196, "Digital Mobile Phone and Data Communication Method" is known. In this conventional example, the voice signal is encoded and decoded using a sound source codebook adapted to the voice characteristics of each user, so that a voice call with the same clarity as a general fixed pay phone call can be obtained. Disclosure technology.

[0009]

In these conventional examples, in communication over a wide transmission band such as music, if the transmission band between the communication terminal and the communication node is narrow, there is a disadvantage that the sound quality is likely to deteriorate.

In the above-mentioned transmission system in which digital data is divided into packet units by increasing the communication speed, the communication channel between the communication terminal and the communication node in the communication network is secured at the time of call setup. Since processing is performed separately with the side communication terminal, the required number of communication channels may not be secured in some cases, and there is a disadvantage that the reliability of the high-quality voice communication is lacking.

The present invention solves such a problem in the prior art, and performs high-speed data communication using a plurality of communication channels, even when the number of secured communication channels is not known. , High-quality voice communication according to the result of securing multiple communication channels becomes possible,
It is an object of the present invention to provide an encoding / decoding communication method and an encoding / decoding communication device.

Further, according to the present invention, the number of communication channels that need to be secured does not have to be determined by the communication node and the receiving device during call setup without changing the processing or configuration in the communication node. It is an object of the present invention to provide an encoding / decoding communication method and an encoding / decoding communication device which increase the reliability of voice communication.

[0013]

In order to achieve the above object, an encoding / decoding communication method according to the present invention is a coding / decoding communication method for performing high-speed communication using a plurality of communication channels, A communication channel securing stage in which a calling communication terminal and a called communication terminal establish a call by a communication channel securing process in a communication network, and after the communication channel shifts to a communication state in the communication channel securing stage, the calling communication is performed. A communication speed confirmation step in which the terminal and the called communication terminal individually confirm the number of communication channels secured, and a coding pattern determination for determining a coding pattern based on the communication channel number confirmation in the communication speed confirmation step And performing communication processing of encoding and decoding for associating the communication speed with the coding pattern that is the result of the coding pattern determination to perform voice communication. And a step of voice communication fit.

In the method of the present invention, the step of confirming the communication speed includes the steps of: (a) confirming the number of secured communication channels by transmitting and receiving a confirmation message directly between the calling communication terminal and the called communication terminal via a communication network; One of a direct negotiation process and (b) an indirect negotiation process for determining the number of communication channels to be reserved based on the result of an error report from the communication network when the maximum communication speed is exceeded.

[0015] In the method of the present invention, the direct negotiation may include (1) a process of editing a message for notifying the number of reserved communication channels of the own communication terminal, and (2) a received communication channel reservation number of the other communication terminal. The process of reading
(3) The processing of comparing the information of the own communication terminal and the information of the other communication terminal to determine the maximum communication speed between the end and the end is executed.

[0016] In the method of the present invention, the indirect negotiation is determined by the transmitting communication terminal from a transmission data amount of the transmitted test data signal and a received error amount, and
In addition, the receiving communication terminal measures the amount of received data to determine the communication speed.

[0017] In the method of the present invention, the indirect negotiation includes: (1) processing for generating a communication channel speed measurement test data signal; (2) processing for determining transmission error information received by communication control; and (3) transmission. A process of determining the maximum communication speed between the end and the end from the data amount and the error information is executed.

In the method of the present invention, after transmitting the transmitted test data signal to the communication network at the transmitting communication terminal, the indirect negotiation may be performed based on the transmitted data amount and the error received by the transmitting communication terminal from the communication network. The communication speed is determined from the amount.

[0019] In the method of the present invention, the indirect negotiation includes: (1) a process of generating a test data signal for communication channel speed measurement; and (2) a process of determining transmission error information to be received and notified by communication control. , (3) processing for editing a fixed pattern of the return start and end instructions, and (4) processing for determining the maximum end-to-end communication speed from the transmission data amount and error information.

[0020] In the method of the present invention, as the step of the voice communication, selecting from a pre-stored speed-based coding pattern,
Based on the encoding pattern information set in the encoding / decoding process, the input information is encoded to process the packet generation / reproduction, or the information by the data generation / reproduction process is decoded to perform the voice input / output process. .

The method of the present invention is characterized in that each of the calling communication terminal and the called communication terminal respectively stores the speed-based coding based on the number of communication channels based on the result of the automatic determination in the direct negotiation processing and the indirect negotiation processing. The coding pattern is determined based on the pattern.

According to the method of the present invention, in the above-mentioned encoding / decoding communication method, the processing in the communication terminal is processing relating to a packet, and information by the packet processing is transmitted and received between the end and the end. .

An encoding / decoding communication apparatus of the present invention performs high-speed communication with a partner apparatus using a plurality of communication channels, and a communication path securing means for setting a call through a communication path securing process in a communication network. And a communication speed confirming means for confirming the number of communication channels individually secured by the partner device and the own device after the communication channel shifts to a communication state by the communication path securing means. Coding pattern determining means for determining a coding pattern based on confirmation of the number of communication channels, and coding and decoding communication for associating a communication speed with a coding pattern which is a result of the determination by the coding pattern determining means. Voice communication processing means for performing processing and performing voice communication.

The apparatus of the present invention, as the call setting in the communication path securing means, issues a call setting request from the own apparatus to the communication network, and the communication network sets the call setting reception for the partner apparatus in the communication path securing processing. In this configuration, the partner device sends a call setting response to the communication network, the communication network connects the communication channel in the communication channel securing process, and the own device receives a call setting completion notification from the communication network.

[0025] In the apparatus of the present invention, the communication speed confirmation means may transmit and receive a confirmation message directly between the own apparatus and the other apparatus through a communication network, and confirm each other to confirm the number of communication channels secured. Alternatively, the configuration is such that an indirect negotiation process for determining the number of reserved communication channels from the error report result when the maximum communication speed is exceeded from the communication network is executed.

The device of the present invention determines the communication speed from the transmitted data amount of the transmitted test data signal and the received error amount, and the partner device determines the received data amount received from the indirect negotiation. The first indirect negotiation process in which the communication speed is measured to determine the communication speed, or after the own device transmits the test data signal to the communication network, the communication speed is determined from the transmission data amount and the error amount received from the communication network. It is configured to perform a second indirect negotiation process to be determined.

[0027] In the apparatus according to the present invention, the coding pattern determining means may determine the communication-compatible coding pattern provided in the apparatus based on the number of communication channels based on the result of the automatic determination in the direct negotiation processing or the indirect negotiation processing in the communication speed checking means. The configuration is such that the coding pattern is determined based on the speed-based coding pattern stored in the storage unit.

[0028] In the apparatus according to the present invention, the voice communication processing means may perform an encoding / decoding process provided in the apparatus from a speed corresponding coding pattern stored in advance in a communication corresponding coding pattern storage unit provided in the apparatus. Based on the encoding pattern information set in the unit, processing packet generation and reproduction to encode the input information from the audio input and output processing unit provided in the device,
Alternatively, information from a data generation / reproduction processing unit provided in the device is decoded and transmitted to the audio input / output processing unit.

According to the apparatus of the present invention, in the encoding / decoding communication apparatus, the processing in the encoding / decoding communication apparatus is processing relating to a packet, and the packet information is transmitted and received between end and end. There is a configuration.

[0030] In the apparatus of the present invention, the voice coding / decoding apparatus further includes a voice coding / decoding means dedicated to a single communication channel for processing voice coding / decoding dedicated to a single communication channel, The communication control unit provided in the device selects the voice coding / decoding device and the voice coding / decoding unit dedicated to the single communication channel, and performs communication using the selected single communication channel and a plurality of communication channels. Is used to perform one of communication with which communication data capacity is secured.

According to the present invention, high-speed data communication is performed using a plurality of communication channels, and even when the number of secured communication channels is not known, the high-speed data communication according to the secured result of the plurality of communication channels is performed. This enables high quality voice communication.

Further, according to the present invention, the number of communication channels that need to be secured does not have to be determined by the communication node and the receiving side device during call setup without changing the processing and configuration of the communication node. Of the voice communication can be obtained.

[0033]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of an encoding / decoding communication method and an encoding / decoding communication apparatus according to the present invention. FIG. 1 is a block diagram illustrating a configuration of an encoding / decoding communication device (hereinafter, referred to as a communication terminal) according to an embodiment of the present invention. In FIG. 1, the communication terminal includes a speech encoding / decoding device 101 that performs an operation corresponding to the present invention and changes a transmission band to be encoded according to a communication speed.

The speech encoding / decoding device 101 includes an encoding / decoding processing unit 102 as an encoding pattern determining unit for performing encoding / decoding based on the encoding pattern information.
In addition, the speed corresponding coding pattern storage unit 103 as a coding pattern determining unit that stores in advance data for determining an operation pattern such as a plurality of coding schemes and coding transmission band information, and Direct negotiation or indirect negotiation described in detail (1)
It has a communication speed negotiation processing unit 104 as communication speed confirmation means for processing (2).

Further, the communication terminal shown in FIG. 1 has a communication control unit 105 for notifying a transition to a communication state and controlling processing such as outgoing and incoming calls at the own communication terminal. Communication channel input / output unit 106 as a communication path securing means for performing connection processing on a communication channel (logical communication line). The communication channel input / output unit 106 is, for example, a wireless transmission / reception system and a modulation / demodulation system in a mobile phone.

Further, the communication terminal shown in FIG. 1 includes an audio data input / output unit 108 as audio communication processing means for inputting / outputting audio signals, together with a data packet generation / reproduction processing unit 107 for performing data packet generation / reproduction processing. Have. The audio data input / output unit 108 is, for example, an audio processing system such as a microphone, a speaker, and an amplifier circuit in a mobile phone.

The communication terminal shown in FIG. 1 includes a communication network 109 of a digital communication network (such as ISDN) and a single communication channel (for example, N-C
A single communication channel dedicated voice coding / decoding device 110 for processing voice coding / decoding for each communication channel in the DMA system) and a data communication input / output unit 111 such as a serial data communication terminal. I have.

It should be noted that the above-mentioned speech encoding / decoding device 10
1. The communication control unit 105 and the data packet generation / reproduction processing unit 107 include, for example, a digital signal processor (D
SP) hardware and microcomputer (MP
U) is realized by hardware and software.

Next, the operation of this embodiment will be described. FIG. 2 is a sequence diagram of a call setting process of the voice encoding / decoding device shown in FIG. 1, and FIG. 3 is a sequence diagram of a process of directly confirming the number of communication channels to be secured (referred to as a direct negotiation process as appropriate). is there. FIG. 4 is a sequence diagram of a process for confirming the number of communication channels indirectly secured by the test data signal (appropriately described as an indirect negotiation process), and FIG. 5 is a diagram of another indirect negotiation process by the test data signal. It is a sequence diagram. FIG. 6 is a block diagram for explaining a case where the number of reserved communication channels is not the same in the transmitting and receiving communication terminals.

In this embodiment, it is assumed that the communication system uses a plurality of communication channels to secure a predetermined communication data capacity. In this case, since the calling communication terminal and the called communication terminal independently secure communication channels, the calling communication terminal and the called communication terminal cannot secure the same number of communication channels. For this reason, the number of communication channels to be reserved is specified from the communication terminal side based on the settings of the communication terminal of the calling side communication terminal and the receiving side, and the communication network reserves a predetermined communication channel based on this specification. . Then, the number of communication channels is determined by a communication process of returning the reservation result to the communication terminal. In other words,
In this embodiment, it is assumed that the number of reservations is not fixedly determined on the communication network side and that the number of communication channels used for the communication state does not change.

First, the operation of the main part in FIG. 1 will be described. The coding / decoding processing unit 102 of the voice coding / decoding device 101 in FIG. 1 performs coding / decoding based on the coding pattern information from the speed-based coding pattern storage unit 103. In addition, the encoding / decoding processing unit 102 encodes the analog audio information from the audio data input / output unit 108 and outputs it as digital data to the data packet generation / reproduction processing unit 107.

Further, the encoding / decoding processing unit 102 decodes the digital data from the data packet generation / reproduction processing unit 107, outputs the digital data to the audio data input / output unit 108 as analog audio information, and performs a communication speed negotiation processing unit. The information on the number of communication channels determined by 104 is sent (notified) to the speed-based coding pattern storage unit 103.

The speed-dependent encoded pattern storage unit 103
In order to determine an operation pattern in the encoding / decoding processing unit 102, a plurality of types of encoding methods and encoding band information corresponding to the number of communication channels to be secured are held.

In the communication processing S2 for determining the coding pattern shown in FIG. 2, the communication speed negotiation processing unit 104
Based on the information on the number of communication channels determined in,
An optimal one is selected from the data for determining the operation pattern, and the operation pattern is encoded and decoded by the encoding / decoding processing unit 10.
Set to 2.

Communication speed negotiation processing unit 104
Receives the notification of the transition to the communication state from the communication control unit 105 and the information of the outgoing / incoming call at the own communication terminal, and directly transmits and receives a confirmation message through the communication network 109 in the communication state to perform a direct negotiation of confirming each other. .

The communication speed negotiation processing unit 1
04 executes the indirect negotiation (1) or (2) of FIG. 4 or FIG. The indirect negotiation processes (1) and (2) utilize the fact that an error packet report rises (is transferred) from a communication network when the maximum communication speed is exceeded, and determines the number of communication channels to be reserved based on the result. .

In the indirect negotiation (1) shown in FIG. 4, a test data signal is transmitted from one of the communication terminals (the communication terminal on the transmission side or the communication terminal on the receiving side). Then, the communication speed is determined based on the received error packet decoding, and the other communication terminal (the transmitting communication terminal or the receiving communication terminal) measures the amount of data received to determine the communication speed.

In the indirect negotiation (2) shown in FIG. 5, the determination process of the transmitting communication terminal is the same as that of the indirect negotiation (1). After the confirmation is completed, the transmission and reception are switched and the same confirmation is performed.

Next, the general overall operation of the communication terminal shown in FIG. 1 will be described. The communication terminal shown in FIG. 1 operates as a calling side or a called side. A signal for confirming the communication speed or a test data signal is transmitted and received between the communication terminal on the calling side and the communication terminal on the receiving side, and the audio data is digitally converted by the encoding / decoding processing unit 102 in the audio encoding / decoding device 101. Process as packet data.

The encoding / decoding processing unit 102 in FIG.
This is the main point of this embodiment, based on the determination result, together with the process of automatically determining the communication speed of the secured communication channel, in other words, the number of secured communication channels from the data content or the maximum communication speed of the test data signal. A process of selecting an optimal encoding pattern and encoding and decoding is performed.

As described above, in this embodiment, digital data is processed by the vocoder device (voice coding / decoding (voice codec) device) for each communication channel.
Further, the audio encoding / decoding device 101 according to the embodiment is provided at a stage prior to the digital data processing to digitize audio information. The receiving side decodes the digital information into audio information in the reverse order. In the conventional voice communication, a process of digitizing voice information is performed by a vocoder device for each communication channel.

It should be noted that the speech coding / decoding device 110 dedicated to a single communication channel shown in FIG. 1 processes speech coding / decoding dedicated to a single communication channel as in the prior art. The communication control unit 1 selects and switches between the communication channel dedicated speech coding / decoding apparatus 110 and the speech coding / decoding apparatus 101 which performs processing corresponding to this embodiment.
05 can be performed. That is, communication using a conventional single communication channel and communication using a plurality of communication channels corresponding to this embodiment to secure communication data capacity can be selectively performed. Note that the operation of the voice coding and decoding apparatus 110 dedicated to a single communication channel is known, and a detailed description thereof will be omitted.

Next, the operation of the configuration shown in FIG. 1 will be described in detail. A communication channel securing phase S11 as a communication channel securing stage in FIG. 2 is a known call connection process. That is, a call setting request is sent from the calling communication terminal to the communication network 109, and call setting acceptance for the called communication terminal is set by a sequence process for securing a communication path of the communication network 109. The receiving communication terminal responds to the communication network 109 with the call setting. The communication network 109 connects the communication paths by the sequence processing for securing the communication paths, and notifies the calling communication terminal of the completion of the call setting.

In the communication channel securing phase S11, FIG.
The communication data capacity is secured between the originating communication terminal 131 and the communication node 133 by using a plurality of communication channels. In addition, a plurality of communication channels are used between the receiving communication terminal 132 and the communication node 134 to secure a communication data capacity. In the example of FIG. 6, the originating communication terminal secures four communication channels, the receiving communication terminal secures five communication channels, and the maximum communication speed between the end and the end by the four communication channels. (Throughput).

In this embodiment, it is assumed that the communication network side does not fixedly determine the number of reserved communication channels as described above, and that the number of used communication channels does not change in the communication state. .

The communication speed of the communication network 109 is proportional to the number of communication channels to be secured. Therefore, after the communication channel shifts to the communication state in the communication channel securing phase S11 in FIG. 2, the communication process S1 is executed as a stage of confirming the communication speed. This communication processing S1
Communication speed confirmation / coding pattern determination phase S1 as a communication speed confirmation stage and a coding pattern determination stage
In FIG. 2, the transmission-side communication terminal 131 shown in FIG.
The communication speed negotiation processing unit 104 confirms the number of communication channels secured by the communication speed negotiation processing unit 104 of the receiving-side communication terminal 132 side. That is, the automatic determination of the number of secured communication channels, which is the main point of this embodiment, is performed. Further, a communication process S2 is performed as a coding pattern determination stage for determining a coding pattern.

The reason for determining the number of reserved communication channels for both the calling communication terminal and the called communication terminal is that, in the example of FIG. 6, when the number of communication channels reserved for the calling communication terminal and the called communication terminal are different. In addition, the end-to-end can use the maximum communication speed of the smaller number of secured communication channels.

In the communication processing S1 for confirming the secured number of communication channels, the communication speed negotiation processing section 104 between the transmitting communication terminal 131 and the receiving communication terminal 132 shown in FIG. There is a direct negotiation process in which messages are transmitted and received and confirmed.

In the direct negotiation shown in FIG. 3, the following processing is performed. (1) a process of editing a message notifying the number of reserved communication channels of the own communication terminal; (2) a process of reading the received number of reserved communication channels of the other communication terminal; (3)
The process of comparing the information of the local communication terminal and the information of the other communication terminal to determine the maximum communication speed between end and end.

Further, the communication process S1 includes the processes shown in FIGS.
As shown in (1), indirect negotiations (1) and (2) are used in which the error packet report goes up (transferred) from the communication network when the maximum communication speed is exceeded, and the number of communication channels to be reserved is determined from the error result. ).

In the indirect negotiation (1), the transmitting communication terminal transmits a test data signal. The transmitting communication terminal determines the communication speed from the amount of data transmitted and the error result of the received error packet report. The communication terminal measures the amount of received data to determine the communication speed, and executes the following processing.

Indirect negotiation shown in FIG. 4 (1) (1) processing for generating a test data signal for measuring communication channel speed, (2) communication control section 105 for transmitting the test data signal
(3) A process for determining the maximum communication speed between the end and the end based on the transmission data amount and the error information.

In the indirect negotiation (2) shown in FIG. 5, the determination process of the transmitting communication terminal is the same as that of the indirect negotiation (1). After the confirmation is completed, the transmission and reception are switched and the same confirmation is performed, and the following processing is executed.

Indirect negotiation shown in FIG. 5 (2) (1) Processing for generating test data signal for communication channel speed measurement, (2) Reception by communication control unit 105, and
A process of determining transmission error information to be notified; (3) a process of editing a fixed pattern of return start and end instructions (based on a count value of the return timer); and (4) a transmission data amount and an error when these are received. Information from end
The process of determining the maximum communication speed between ends.

In these direct negotiations and indirect negotiations (1) and (2), since each message, fixed pattern, and test data signal need to be transmitted and received between the end and the end as all packet information, they are generated and reproduced by data packets. The processing is performed through the processing unit 107.

Based on the number of communication channels based on the results of the automatic determination in these direct negotiations and indirect negotiations (1) and (2), the transmission-side communication terminal 131 and the destination-side communication terminal 132 store the rate-corresponding encoded pattern storage section in FIG. 103 performs communication processing S2 for determining an encoding pattern, and extracts a corresponding encoding pattern.

In the communication phase S13 in FIG. 2, the encoding / decoding processing unit 102 in FIG. 1 determines the communication speed, which is the main point of this embodiment, based on the result of the communication processing S2 for determining the encoding pattern. An encoding / decoding communication process S3 is performed to make it correspond, and voice communication using packet data is performed.

In the coding / decoding communication process S3 corresponding to the communication speed in the communication phase S13, the speed-based coding pattern storage unit 103 stores the audio data based on the coding pattern information set in the coding / decoding processing unit 102. The input information from the input / output unit 108 is encoded and output to the data packet generation / reproduction processing unit 107. Conversely, the information from the data packet generation / reproduction processing unit 107 is decoded and output to the audio input / output processing unit 108. .

Next, a specific example of this embodiment will be described. FIG. 7 is a block diagram for explaining the disassembly and assembly of packets in the four communication channels (logical communication lines) according to the PPP (Point to Point) protocol. Referring to FIG. 7, at the time of transmission, an analog audio signal from audio data input / output unit 108 is converted into continuous digital data Sa encoded by encoding / decoding processing unit 102 and continuous digital data from data communication input / output unit 111. The data Sa is converted into continuous packet data Sb (for example, continuous packet data pkd-A, pkd-B, pk by the PPP protocol) by the data packet generation / reproduction processing unit 107.
d-C, pkd-D).

The continuous packet data Sb is transmitted to the packet data Sc of four communication channels (here, the packet data pkd-B, pkd-A, p
kd-D, pkd-C) and transmitted from the switching equipment to the communication network 109 (for example, the Internet network).

At the time of reception, a process reverse to that at the time of transmission is performed. That is, packet data Sc (packet data pkd-B, p from the top of the communication channel diagram) distributed to four communication channels from the switching equipment and the communication network 109.
kd-A, pkd-D, and pkd-C) are transmitted through the communication channel input / output unit 106.
d. This continuous packet data Sd is converted into the continuous digital data S
e and output to the audio data input / output unit 108 and the data communication input / output unit 111. Continuous digital data S
e is decoded by the encoding / decoding processing unit 102, and this analog signal is output to the speaker of the audio data input / output unit 108.

The processing of the communication channel input / output unit 106 and the data packet generation / reproduction processing unit 107 is executed by a control signal from the communication control unit 105.

Further, this embodiment is applied to a narrow transmission band (N)
A specific example when applied to a CDMA mobile communication system will be described. In the case of the N-CDMA system, a communication sequence between a communication terminal and a communication node (corresponding to a cell base station in this case) is executed according to a communication sequence of TIA standard IS95 series. When high-speed data communication is performed as in this embodiment, a communication sequence based on IS95B is executed. Generally, when the communication capability of the vocoder device in the communication terminal and the communication node in the communication channel is relatively low such as 9600 bps or 14400 bps, a plurality of the transmission speeds are used simultaneously to increase the apparent communication speed. Things. According to IS95B, up to eight communication channels can be used simultaneously.

For example, when it is desired to secure the same sound quality and transmission band as those of the fixed telephone network, it is only necessary to secure a communication speed of 64 kbps with only valid data, excluding header information of packet communication. In a communication sequence based on the IS95B standard, the maximum transmission speed is 14400 bps × 8
The communication channel becomes 115.2 kbps. That is, it is possible to implement this embodiment.

[0075]

As is apparent from the above description, according to the encoding / decoding communication method and the encoding / decoding communication apparatus of the present invention, when performing high-speed data communication using a plurality of communication channels. In addition, even when the number of secured communication channels is not known, high-quality voice communication corresponding to the secured result of the plurality of communication channels can be achieved.

Further, according to the present invention, the number of communication channels that need to be secured may not be determined by the communication node and the receiving communication terminal during call setup without changing the processing and configuration of the communication node. There is an effect that the reliability of voice communication with high quality can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a communication terminal according to an embodiment of the present invention.

FIG. 2 is a sequence diagram for explaining a call setting process of the speech encoding / decoding device shown in FIG.

FIG. 3 is a sequence diagram of a direct negotiation process in the embodiment.

FIG. 4 is a sequence diagram of an indirect negotiation process in the embodiment.

FIG. 5 is a sequence diagram for explaining another indirect negotiation process in the embodiment.

FIG. 6 is a block diagram illustrating a case where the number of reserved communication channels is not the same in the transmitting and receiving communication terminals in the embodiment.

FIG. 7 is a block diagram for explaining an example of disassembly and assembly processing of a packet according to a PPP protocol in the embodiment.

FIG. 8 is a diagram for explaining a relationship between a frequency spread distribution of audio information and a transmission bandwidth depending on the number of communication channels in a conventional example.

[Explanation of symbols]

 Reference Signs List 101 voice coding / decoding device 102 coding / decoding processing unit 103 speed-dependent coding pattern storage unit 104 communication speed negotiation processing unit 105 communication control unit 106 communication channel input / output unit 107 data packet generation / reproduction processing unit 109 communication network 110 single Speech coding / decoding device for one communication channel 111 Data communication input / output unit S1 Communication processing for confirming the number of communication channels S2 Communication processing for determining coding pattern S3 Encoding / decoding communication processing corresponding to communication speed S11 Communication channel securing phase S12 Communication speed confirmation / coding pattern determination phase S13 Communication phase

Continued on the front page F term (reference) 5D045 DA20 5K030 GA01 GA11 HA08 HB01 HB12 HB17 HB28 KA19 LA01 LA07 LB02 LB06 5K034 AA01 AA05 CC05 EE07 EE11 HH01 HH09 HH12 HH16 HH63 JJ11 LL22 MM08 NN25

Claims (18)

[Claims] An encoding / decoding communication method for performing high-speed communication using a plurality of communication channels, wherein a calling communication terminal and a called communication terminal perform call setting by a communication channel securing process in a communication network. A communication channel securing step, and a communication speed confirmation step of confirming the number of communication channels individually secured by the calling communication terminal and the called communication terminal after the communication channel shifts to the communication state by the communication channel securing step. And an encoding pattern determining step of determining an encoding pattern based on the communication channel number confirmation in the communication rate confirming step. In order to make a communication rate correspond to an encoding pattern which is a result of the encoding pattern determination. A voice communication stage for performing voice communication by executing the communication process of encoding and decoding. 2. The step of confirming the communication speed according to claim 1, wherein (a) confirming the number of communication channels secured by transmitting and receiving a confirmation message directly between the calling communication terminal and the called communication terminal via a communication network. And (b) indirect negotiation processing for determining the number of reserved communication channels from the error report result when the maximum communication speed is exceeded from the communication network. Communication method. 3. The direct negotiation according to claim 2, wherein: (1) processing for editing a message for notifying the number of reserved communication channels of the own communication terminal; and (2) securing of the received communication channel of the other communication terminal. (3) comparing the information of the local communication terminal with the information of the other communication terminal to determine the maximum end-to-end communication speed. 4. The indirect negotiation according to claim 2, wherein the transmitting side communication terminal determines a communication speed from a transmission data amount of the transmitted test data signal and a received error amount, and
An encoding / decoding communication method, wherein a receiving communication terminal measures a received data amount to determine a communication speed. 5. The indirect negotiation according to claim 2, wherein (1) a process of generating a communication channel speed measurement test data signal, (2) a process of determining transmission error information received by communication control, and (3). Determining a maximum communication speed between the end and the end from the transmission data amount and the error information. 6. The indirect negotiation according to claim 2, wherein in the transmitting side communication terminal, after transmitting the transmitted test data signal to the communication network, the transmission data amount and the transmission side communication terminal receive from the communication network. An encoding / decoding communication method characterized by determining a communication speed from an error amount. 7. The indirect negotiation according to claim 2, wherein (1) processing for generating a communication channel speed measurement test data signal, and (2) transmission error information to be received and notified by communication control. Processing, (3) processing for editing a fixed pattern of the return start and end instructions, and (4) processing for determining the maximum end-to-end communication speed from the transmission data amount and error information. Encoding / decoding communication method. 8. The voice communication according to claim 1, wherein the input information is encoded based on encoding pattern information set in an encoding / decoding process selected from pre-stored velocity-specific encoding patterns. Process packet generation and playback,
Alternatively, an encoding / decoding communication method characterized by decoding information by data generation / reproduction processing and performing audio input / output processing. 9. A speed-corresponding code stored in advance in each of the calling communication terminal and the called communication terminal according to the number of communication channels based on the result of the automatic determination in the direct negotiation processing and the indirect negotiation processing according to claim 2. An encoding / decoding communication method characterized by determining an encoding pattern based on an encoding pattern. 10. The encoding / decoding communication method according to claim 1, wherein the processing in the communication terminal is processing relating to a packet, and information based on the packet processing is transmitted and received between the end and the end. An encoding / decoding communication method, comprising: 11. An encoding / decoding communication device for performing high-speed communication with a partner device using a plurality of communication channels, a communication path securing means for setting a call through a communication channel securing process in a communication network. Communication speed confirmation means for confirming the number of communication channels individually secured by the partner device and the own device after the communication channel is shifted to the communication state by the communication channel securing means; and the number of communication channels in the communication speed confirmation means. A coding pattern deciding means for deciding a coding pattern based on the confirmation of the above, and a coding and decoding communication process for associating a communication speed with a coding pattern which is a decision result of the coding pattern deciding means. And a voice communication means for performing voice communication. 12. As a call setting in the communication channel securing means according to claim 11, a call setting request is issued from the own device to a communication network, and the communication network sets a call setting reception for the partner device in the communication channel securing process. The other device sends a call setting response to the communication network, the communication network connects the communication channel in the communication channel securing process, and the own device receives a call setting completion notification from the communication network. Encoding / decoding communication device. 13. A direct negotiation process in which the communication speed confirmation means according to claim 11 transmits and receives a confirmation message directly between the own device and the other device through a communication network and confirms the number of communication channels secured by confirming each other. Or an indirect negotiation process for determining the number of communication channels to be reserved from an error report result from a communication network when the communication speed exceeds a maximum communication speed. 14. The indirect negotiation according to claim 13, wherein the own device determines the communication speed from the amount of transmitted data of the transmitted test data signal and the amount of received error, and
A first indirect negotiation process of measuring a received data amount to determine a communication speed, or an own device transmitting a test data signal to a communication network, and then transmitting the test data signal and an error received from the communication network. An encoding / decoding communication device, which is a second indirect negotiation process for determining a communication speed from an amount. 15. An apparatus according to claim 11, wherein said coding pattern determining means determines the communication-compatible coding provided in said apparatus by the number of communication channels based on an automatic determination result in direct negotiation processing or indirect negotiation processing in said communication speed checking means. An encoding / decoding communication device, which determines an encoding pattern based on a velocity-based encoding pattern stored in a pattern storage unit. 16. The speech communication processing means according to claim 11, wherein said coding / decoding provided in said device is performed from a speed-based coding pattern previously stored in a communication-based coding pattern storage unit provided in said device. Based on the encoding pattern information set in the processing unit, processes the packet generation and reproduction for encoding the input information from the audio input / output processing unit provided in the device, or the data generation and reproduction processing unit provided in the device An encoding / decoding communication device, which decodes information from the communication device and sends the information to the audio input / output processing unit. 17. The encoding / decoding communication apparatus according to claim 11, wherein the processing in said encoding / decoding communication apparatus is processing relating to a packet, and said packet information is transmitted from end to end. An encoding / decoding communication device for transmitting / receiving data via a communication device. 18. The voice coding / decoding device according to claim 11, further comprising a voice coding / decoding unit dedicated to a single communication channel for processing voice coding / decoding dedicated to a single communication channel. The communication control unit provided in the audio encoding / decoding device selects the audio encoding / decoding device and the audio encoding / decoding device dedicated to the single communication channel, and performs communication using the selected single communication channel. And a communication for securing a communication data capacity by using a plurality of communication channels.