JP4188190B2 - Information multiplexer, audio processing device, information demultiplexer, reception processing device, telephone terminal, node, telephone system, information multiplexing method, information separation method, information multiplexing program, information separation program, and recording medium recording the program - Google Patents

Description

  The present invention relates to a telephone system that performs communication between voice data and information data different from the voice data. In particular, the present invention relates to multiplexing and separation of silence compressed data obtained by silence compression of audio data and the information data.

  A conventional telephone system can perform not only voice data communication but also non-voice data communication by using a data communication adapter such as a modem. However, normally, voice data communication and non-voice data communication cannot be performed simultaneously in one communication line. Therefore, as described in Patent Documents 1 and 2 below, it has been proposed to detect whether there is sound or no sound and switch between voice data communication when there is sound and non-voice data communication when there is no sound.

  On the other hand, in the third generation mobile phone systems that have begun to spread, digital wireless communication systems such as W-CDMA (Wideband Code Division Multiple Access) are used. As the audio codec processing, high compression rate and high sound quality are achieved. A voice algorithm that combines In the above audio codec processing, in order to reduce the amount of audio information as much as possible, silence compression processing is performed during silence, thereby realizing audio processing with a smaller amount of information than normal audio processing. Yes.

  The voice codec process will be described by taking a W-CDMA voice call as an example. In a voice call of the W-CDMA system, it is essential to implement an AMR (Adaptive Multi Rate) process as a voice codec process, and it is also necessary to implement a silence compression process. FIG. 14 shows a schematic configuration of an AMR processing unit on the encoder side (transmission side), and FIG. 15 shows a schematic configuration of an AMR processing unit on the decoder side (reception side). The solid line in the figure indicates the flow of audio data, and the broken line indicates the flow of other various information.

  As shown in FIG. 14, the encoder-side AMR processing unit 100 includes a speech input unit 101, an AMR encoding unit 102, a silence detection unit 103, a SID (Silence Descriptor) frame creation unit 104, an encoded bit string generation unit 105, and The audio code data output unit 106 is provided. The voice input unit 101 receives voice data input from the outside of the AMR processing unit 100 and transmits it to the AMR coding unit 102.

  The AMR encoding unit 102 transmits the audio data from the audio input unit 101 to the silence detection unit 103 and the SID frame creation unit 104. In addition, the AMR encoding unit 102 receives the silence detection data for notifying the detection of the silence state from the silence detection unit 103, and encodes and encodes the voice data in the sound state based on the received silence detection data. The audio data is transmitted to the encoded bit string generation unit 105.

  The silence detection unit 103 receives audio data from the audio input unit 101 via the AMR encoding unit 102, and detects whether or not the received audio data is silent. When it is detected that there is a silence state, the silence detection data is transmitted to the AMR coding unit 102 and the SID frame creation unit 104.

  The SID frame creation unit 104 receives voice data from the voice input unit 101 via the AMR coding unit 102 and receives the silence detection data from the silence detection unit 103. Based on the received silence detection data, silent data is created for silent audio data. The generated silent data is transmitted to the encoded bit string generation unit 105. Details of the silent data will be described later.

  The encoded bit string generation unit 105 receives the encoded voice data when there is sound from the AMR encoding unit 102 and also receives the data when there is no sound from the SID frame creation unit 104, and a data string according to the AMR format AMR audio data is generated. The generated AMR audio data is transmitted to the audio code data output unit 106. The speech code data output unit 106 receives the AMR speech data from the encoded bit string generation unit 105 and outputs it to the outside of the AMR processing unit 100.

  As shown in FIG. 15, an AMR processing unit 110 on the decoder side includes a speech code data input unit 111, a data string analysis unit 112, an AMR decoding unit 113, an error frame / lost frame processing unit 114, and a CNG (Comfort Noise Generation). The configuration includes a generation unit 115 and a decoded audio output unit 116. The speech code data input unit 111 receives AMR speech data input from the outside of the AMR processing unit 110 and transmits it to the data string analysis unit 112.

  The data string analysis unit 112 analyzes the frame configuration of the AMR audio data from the audio code data input unit 111. As a result of the analysis, if the data is sound, the AMR decoding unit 113 is notified that there is sound and transmits AMR sound data. On the other hand, in the case of silent data, the CNG generator 115 is notified that there is no sound and transmits AMR audio data. In addition, when it is an error frame or when data is not included, the error frame / lost frame processing unit 114 is notified of the case.

  When the error frame / lost frame processing unit 114 receives the notification from the data string analysis unit 112, the error frame / lost frame processing unit 114 performs error frame processing or lost frame processing and instructs the AMR decoding unit 113 to generate corresponding audio data. When the CNG generation unit 115 receives the notification and the AMR audio data from the data string analysis unit 112, the CNG generation unit 115 generates audio data in a silent state and transmits it to the AMR decoding unit 113.

  When the AMR decoding unit 113 receives the notification and the AMR voice data from the data string analysis unit 112, the AMR decoding unit 113 decodes the voiced AMR voice data and generates voiced voice data. In addition, the AMR decoding unit 113 receives silent sound data from the CNG generation unit 115. The AMR decoding unit 113 generates audio data based on an instruction from the error frame / lost frame processing unit 114. These audio data are transmitted to the decoded audio output unit 116. The decoded audio output unit 116 receives the audio data from the AMR decoding unit 113 and outputs it to the outside of the AMR processing unit 110.

  Next, the details of the silence process in the AMR process will be described with reference to FIGS. The silent processing in the AMR processing is described in detail in Non-Patent Document 1 below.

FIG. 16 shows a frame structure when the sound state is changed to the silent state in the AMR process. In the figure, one alphabet represents one frame of AMR audio data, and the frames indicated by the alphabets S, F, U, and N each have the following information.
S (sound frame): voice information,
F (SID_FIRST frame): Silence information (information sent at the beginning of the continuous silence state),
U (SID_UPDATE frame): Silence information (information sent after the second continuous silence),
N (NO_DATA frame): No data.

In the specification of AMR processing, as shown in FIG. 16, when it is determined that there is a continuous silence state from the sound determination to the silence determination, the following frames are transmitted in order. When switching from silent determination to voice determination, the voice frame S is sent immediately after returning to the voice processing.
1) 7 audio frames S,
2) One SID_FIRST frame F,
3) 3 NO_DATA frames N,
4) One SID_UPDATE frame U,
5) 7 NO_DATA frames N,
6) Hereinafter, repeat from 4) until sound determination is made.

  Thus, the SID frames F · U are transmitted at a predetermined interval. Note that this interval depends on the audio codec and is not necessarily equal.

  FIG. 17 shows the number of bits of various frames in a table format. In the figure, columns of a frame type, an AMR codec mode, a total number of bits, and classes AC are provided in order from the left side. . Frame types 0 to 7 correspond to audio frames transmitted at various transmission speeds (4.75 kbps to 12.2 kbps), respectively, and frame type 8 corresponds to the SID frame F · U. The frame type 15 corresponds to the NO_DATA frame N.

  As shown in FIG. 17, in the AMR process, the data amount (bit length) per frame differs for each AMR codec mode. Therefore, the AMR codec mode can be determined by detecting the data amount per frame.

  Also, as shown in FIG. 17, for example, the audio frame S in the 12.2 kbps mode has a bit length of 244 bits, the silent SID frame F · U has a bit length of 39 bits, and NO_DATA in the silent state. The frame N has a bit length of 0 bits.

  For this reason, when switching from the voiced state to the silent state, as shown in FIG. 16, the amount of transmitted data is significantly reduced, that is, the sound is compressed. In the figure, the numerical value described in the transmission data amount is the number of bits per frame.

  For example, if the data transmission rate of the voice frame S is 12.2 kpbs, when the silent state continues, one SID_UPDATE frame U and seven NO_DATA frames N are transmitted. 0.24 kbps (= 12.2 × (39 × 1 + 0 × 7) / (244 × 8)).

  FIG. 18 shows the formats of the SID_FIRST frame F and the SID_UPDATE frame U with respect to the SID frame. As shown in the figure, since the first bit in the SID_FIRST frame F and the SID_UPDATE frame U is an STI (SID Type Indicator) that is an identifier indicating the type of SID, the SID_FIRST frame F and SID_UPDATE are referred to by referring to the first bit. It is possible to determine which of the frames U is.

  As shown in FIG. 17, the data structure in each frame is classified into classes A to C according to the importance of bits. FIG. 19 shows error correction coding and CRC (cyclic redundancy check) performed corresponding to each class. As shown in the figure, the error correction and error detection processes are different for each class.

Further, in the wireless transmission processing unit of the mobile phone terminal, wireless transmission processing corresponding to AMR audio data is performed. Specifically, the audio frame S is divided into classes A to C, and channel coding processing corresponding to each class is performed. Further, channel coding processing corresponding to class A is performed for the SID frames F and U. Further, in the wireless reception processing unit of the mobile phone terminal, the determination of the data amount at the time of decoding the wireless data is used as it is as the determination of sound / silence.
JP 7-15408 A (published January 17, 1995) JP-A-8-84201 (published March 26, 1996) E. Ekudden, 'AMR speech Codec; Source Controlled Rate operation', [online], 3GPP TS 26.093 V6.0.0, Mar. 24, 2003. [Search date 2003.7.22], Internet <URL: http: // www.3gpp.org/ftp/Specs/archive/26_series/26.093/26093-600.zip>

  As described above, recent third-generation mobile phone systems and the like have an effect of reducing the average data transmission rate of voice data as compared with the data transmission rate provided by the telephone system by silent compression processing. On the other hand, in the audio codec processing, a procedure for transmitting other information data using the difference in data transmission speed is not assumed at present. For this reason, in order to transmit other information data, it is necessary to define, for example, the data multiplexing means described in Patent Documents 1 and 2 separately from the means for performing the audio codec processing.

  However, the data multiplexing means described in Patent Documents 1 and 2 cannot transmit a silence identifier (SID frame) at predetermined intervals when in a silence state, and support silence compression processing. I can't. For this reason, it cannot be used for a telephone system that performs silence compression processing.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an information multiplexer / information decoder that can multiplex / separate other information data even in a telephone system that performs silence compression processing. To provide a multiplexer or the like.

  In order to solve the above problems, an information multiplexer according to the present invention is an information multiplexer that multiplexes silence-compressed data obtained by silence-compressing sound data and information data different from the sound data, the silence-compressed data Is a silence data portion that is a silent voice data portion that is not producing a voice, and is converted into a silence compression data portion that includes the silence identifier indicating the silence state at predetermined intervals, and the silence identifier is detected. And a means for incorporating the information data between the silence identifiers in the silence compressed data portion based on the detection result of the detection means.

  Further, in the information multiplexer according to the present invention, in the above configuration, the silence compression data portion in which the information data is incorporated by the incorporation means includes a plurality of frames, and the frame including the silence identifier includes the information data Compared with a frame including a part of the data structure, the data structure is different.

  Furthermore, the information multiplexer according to the present invention is characterized in that, in the above configuration, the incorporation means repeatedly incorporates the same information data.

  Furthermore, the information multiplexer according to the present invention is characterized in that, in the above-described configuration, the information multiplexer further includes multiplexing control means for controlling multiplexing of the silence compressed data and the information data by the incorporating means.

  Also, the audio processing device according to the present invention is different from the audio data in the audio data compression unit, the audio data compressed by the audio compression unit, and the audio data compressed by the audio compression unit. An audio processing device comprising multiplexing means for multiplexing information data, wherein the silent compression means is a silent data portion in which the input voice data portion is a silent voice data portion that is not producing a voice In the audio data, the silence data portion detected by the silence detection device is replaced with a silence compression data portion including a silence identifier indicating the silence state at predetermined intervals. Replacement means, and the multiplexing means obtains position information of the silence identifier in the silence compressed data portion from the replacement means. And, based on the obtained position information, between each other the silent identifier in the silence compression data part, it is characterized by comprising a built-in means for incorporating the information data.

  Furthermore, the speech processing device according to the present invention is characterized in that, in the above configuration, the silence compression means further comprises speech encoding means for encoding input speech data.

  The information demultiplexer according to the present invention is an information demultiplexer for separating multiplexed data obtained by multiplexing silence-compressed data obtained by silently compressing audio data and information data different from the audio data into respective data. The silence compression data is obtained by converting a silence data portion, which is a silence state voice data portion not producing a voice, into a silence compression data portion including a silence identifier indicating the silence state at predetermined intervals. The multiplexed data is obtained by incorporating the information data between the silence identifiers in the silence identification data portion, and detecting means for detecting the silence identifier from the multiplexed data; and Separation means for separating the information data from between the silence identification data based on a detection result. .

  Furthermore, in the information demultiplexer according to the present invention, in the above configuration, the multiplexed data is composed of a plurality of frames, and the data structure of the frame including the silence identifier is different from the frame including a part of the information data. By utilizing this, the detection means detects a frame including the silence identifier, and the separation means separates a frame including a part of the information data.

  Furthermore, the information demultiplexer according to the present invention is the above configuration, wherein the multiplexed data is data in which the same information data is repeatedly incorporated, and collation for collating repeated portions of the information data separated by the separation means It is characterized by further providing a means.

  Furthermore, an information demultiplexer according to the present invention is characterized in that, in the above configuration, an information data output control means for controlling the output of the information data separated from the multiplexed data is provided.

  Further, the reception processing device according to the present invention includes a reception processing means for performing a reception process of multiplexed data obtained by multiplexing silence-compressed data obtained by silently compressing audio data and information data different from the audio data, and the reception processing unit A reception processing device including separation means for separating the multiplexed data received and processed by the processing means into each data, wherein the silence compression data is a silence data portion that is a silent voice data portion that is not producing a voice The data portion is converted into a silence compressed data portion including a silence identifier indicating the silence state at predetermined intervals, and the multiplexed data is between the silence identifiers in the silence identification data portion. Information data is incorporated, and the reception processing means further includes reception rate determination means for determining the reception rate of each part of the multiplexed data. And, said separating means based on the difference of the determined reception rate at the reception rate determining means, and characterized in that the separation in the silence compression data and the information data.

  Further, the telephone terminal according to the present invention multiplexes the silence compression means for silently compressing the voice data, the silence compression data silence-compressed by the silence compression means, and information data different from the voice data. An information multiplexer having a structure, a transmitting means for transmitting multiplexed data multiplexed by the information multiplexer, a receiving means for receiving multiplexed data, and the multiplexed data received by the receiving means for converting the silence compressed data And an information demultiplexer configured as described above that separates into the information data or a reception processing device configured as described above, and an audio restoration means that restores the silence-compressed data separated by the information demultiplexer into the original audio data. It is a feature.

  Furthermore, the telephone terminal according to the present invention is characterized in that, in the above configuration, the audio processing device having the above configuration is provided instead of the silence compression means and the information multiplexer.

  The node according to the present invention is a node capable of communicating with the telephone terminal having the above-described configuration, and includes a receiving means for receiving multiplexed data from the telephone terminal, and the multiplexed data received by the receiving means as the silence. An information demultiplexer configured as described above that separates into compressed data and the information data or a reception processing device configured as described above, an information multiplexer configured as described above that multiplexes the silent compressed data and information data different from the audio data, And transmitting means for transmitting the multiplexed data multiplexed by the information multiplexer to the telephone terminal.

  The telephone system according to the present invention is characterized in that the telephone terminals having the above-described configuration are connected via a communication network.

  Furthermore, the telephone system according to the present invention is characterized in that, in the above configuration, the communication network includes a node having the above configuration.

  The information multiplexing method according to the present invention is an information multiplexing method for multiplexing silence compressed data obtained by silently compressing voice data and information data different from the voice data, wherein the silence compressed data is: A silence data portion that is a sound data portion in a silent state that is not producing a voice is converted into a silence compressed data portion that includes a silence identifier indicating the silence state at predetermined intervals. The method includes a detection step of detecting a silence identifier, and a step of incorporating the information data between the silence identifiers in the silence compression data portion based on a detection result of the detection step.

  Also, the information separation method according to the present invention is an information separation method for separating multiplexed data obtained by multiplexing silence-compressed data obtained by silence-compressing voice data and information data different from the voice data into respective data. The silence compression data is obtained by converting a silence data portion, which is a silence state voice data portion not producing a voice, into a silence compression data portion including a silence identifier indicating the silence state at predetermined intervals. The multiplexed data is obtained by incorporating the information data between the silence identifiers in the silence identification data portion, and a detection step of detecting the silence identifier from the multiplexed data, and the detection step And a separation step of separating the information data from between the silence identification data based on a detection result.

  An information multiplexing program according to the present invention is an information multiplexing program for operating the information multiplexer having the above configuration, and is an information multiplexing program for causing a computer to function as each of the above means. Yes.

  An information separation program according to the present invention is an information separation program for operating the information demultiplexer having the above-described configuration, and is an information separation program for causing a computer to function as each means.

  A computer-readable recording medium according to the present invention is characterized in that the information multiplexing program or the information separation program is recorded.

  As described above, the information multiplexer according to the present invention includes a detection unit that detects the silence identifier, and the information data between the silence identifiers in the silence compression data portion based on a detection result of the detection unit. It is the structure provided with the incorporating means which incorporates.

  According to the above configuration, the incorporating means incorporates information data between the silence identifiers detected by the detecting means. As a result, even if the information data is multiplexed, the silence identifier is included at every predetermined interval, so that it is possible to realize multiplexing of the information data even in the telephone system that performs the silence compression process.

  The incorporation means may incorporate the information data from the first silence identifier that switches from the voiced state to the silent state, or may incorporate the information data from the first silent identifier a predetermined number of times or after a predetermined time has elapsed. .

  The information multiplexer may be provided in a voice encoding unit that performs a voice encoding process including a silence compression process, or may be provided in a transmission processing unit that converts data into transmission data.

  Further, in the information multiplexer according to the present invention, in the above configuration, the silence compression data portion in which the information data is incorporated by the incorporation means includes a plurality of frames, and the frame including the silence identifier includes the information data Compared with a frame including a part of the data structure, the data structure is different.

  Here, examples of different data structures include different frame bit lengths and different CRCs.

  According to said structure, it can identify easily from the data structure whether it is a flame | frame containing a silence identifier or a frame containing a part of information data. Therefore, there is an effect that the information data can be easily separated from the multiplexed data in which the information data is multiplexed.

  Furthermore, the information multiplexer according to the present invention is configured such that, in the above configuration, the incorporation means repeatedly incorporates the same information data.

  According to said structure, there exists an effect that information data can be transmitted reliably by incorporating the same information data repeatedly. Information data may be repeatedly incorporated, or part of information data may be incorporated repeatedly.

  Furthermore, the information multiplexer according to the present invention is a configuration further comprising multiplexing control means for controlling multiplexing of the silence compressed data and the information data by the incorporating means in the above configuration.

  Specific examples of controlling this multiplexing include controlling whether to provide the information data to the incorporating means, and controlling whether the incorporating means incorporates the information data into the silence compressed data. To do.

  According to the above configuration, the multiplexing control means can control whether or not the information data is multiplexed and output, so that information can be prevented from being output without permission.

  In addition, the speech processing device according to the present invention includes a silence detection means for detecting that the input speech data portion is a silence data portion that is a silent speech data portion that is not producing a voice, and the speech data The silence compression means comprises a replacement means for replacing the silence data portion detected by the silence detection means with a silence compressed data portion including a silence identifier indicating the silence state at predetermined intervals, and the multiplexing compression means Obtaining means acquires position information of the silence identifier in the silence compressed data portion from the replacement means, and based on the acquired position information, the information between the silence identifiers in the silence compressed data portion is obtained. And a built-in means for incorporating data.

  According to the above configuration, the incorporating means incorporates the information data between the silence identifiers based on the position information of the silence identifier in the silence compressed data portion obtained from the replacement means. As a result, even if the information data is multiplexed, a silence identifier is included at every predetermined interval. Therefore, it is possible to realize multiplexing of the information data by a voice processing device that performs a silence compression process.

  Furthermore, the speech processing device according to the present invention is configured such that, in the above configuration, the silence compression means further includes speech encoding means for encoding input speech data.

  According to said structure, since an audio | voice encoding means encodes audio | voice data, there exists an effect of transmitting audio | voice data efficiently and reliably.

  Note that the speech encoding means may encode speech data that has been silence-compressed. The speech encoding means can also encode only the speech data portion in a voiced state.

  The information demultiplexer according to the present invention separates the information data from between the silence identification data based on a detection means for detecting the silence identifier from the multiplexed data and a detection result of the detection means. And a separating means.

  According to the above configuration, since the separating unit separates the information data incorporated between the silence identifiers detected by the detecting unit from the multiplexed data, there is an effect that the separation of the information data from the multiplexed data can be realized. .

  The information demultiplexer may be provided in a voice decoding unit that performs a voice decoding process, or may be provided in a reception processing unit that converts transmission data into original data.

  Furthermore, in the information demultiplexer according to the present invention, in the above configuration, the multiplexed data is composed of a plurality of frames, and the data structure of the frame including the silence identifier is different from the frame including a part of the information data. Accordingly, the detection means detects a frame including the silence identifier, and the separation means separates a frame including a part of the information data.

  According to said structure, it can identify easily from the data structure whether it is a flame | frame containing a silence identifier or a frame containing a part of information data. Therefore, there is an effect that the information data can be easily separated from the multiplexed data in which the information data is multiplexed.

  Furthermore, the information demultiplexer according to the present invention is the above configuration, wherein the multiplexed data is data in which the same information data is repeatedly incorporated, and collation for collating repeated portions of the information data separated by the separation means It is the structure further provided with a means.

  According to said structure, the repeating part of information data can be discriminate | determined by a collation means. Therefore, it is possible to cope with a case where the transmission side repeatedly transmits information data in order to reliably transmit the information data.

  Furthermore, the information demultiplexer according to the present invention is configured to include information data output control means for controlling the output of the information data separated from the multiplexed data in the above configuration.

  Specific examples of controlling the output of the information data include controlling whether or not the separating means separates the information data, controlling whether or not the separated information data is output, and encoding the information data. If so, it is possible to control whether or not to decode the separated information data.

  According to said structure, since it can control whether an information data output control means outputs information data, acquisition of undesired information data like a computer virus etc. can be controlled, for example.

  In the reception processing device according to the present invention, the reception processing means further includes a reception rate determination means for determining a reception rate of each part of the multiplexed data, and the separation means is included in the reception rate determination means. Based on the difference in the reception rates determined in this way, the silence compressed data and the information data are separated.

  According to said structure, the isolation | separation means is isolate | separated into silence compression data and information data based on the difference in a reception rate. As a result, it is possible to realize separation of multiplexed data in which information data is multiplexed with silence-compressed audio data.

  The telephone terminal according to the present invention includes an information multiplexer configured as described above, wherein the silence compression data silenced by the silence compression means and information data are multiplexed, and multiplexed data multiplexed by the information multiplexer. An information demultiplexer having the above configuration or receiving the above configuration that separates the multiplexed data received by the receiving unit into the silence-compressed data and the information data. It is a structure provided with a processing device and the audio | voice decompression | restoration means to decompress | restore the silence compression data isolate | separated by this information demultiplexer into the original audio | voice data.

  According to the above configuration, the telephone terminal can multiplex and transmit the silence compressed data and the information data, and can separate the multiplexed data into the silence compressed data and the information data, so that the information data can be transmitted and received during a call. There is an effect.

  Instead of the silence compression means and the information multiplexer, an audio processing device having the above configuration can be provided.

  The node according to the present invention includes a receiving means for receiving multiplexed data from the telephone terminal, and an information data having the above configuration for separating the multiplexed data received by the receiving means into the silence compressed data and the information data. Multiplexer or reception processing device having the above structure, information multiplexer having the above structure for multiplexing the silence compression data and the information data, and transmission means for transmitting the multiplexed data multiplexed by the information multiplexer to the telephone terminal It is the structure provided with.

  According to the above configuration, the node can multiplex multiplexed data from the telephone terminal into silence compressed data and information data, and multiplex the silence compressed data and information data to transmit to the telephone terminal. Therefore, there is an effect that information data can be transmitted and received between the telephone terminal and the node during a telephone call between the telephone terminals.

  Similarly, the telephone system according to the present invention has an effect that information data can be transmitted and received during a call by connecting a plurality of telephone terminals having the above configuration via a communication network.

  In addition, by including the node having the above configuration in the telephone system having the above configuration, it is possible to transmit and receive information data between the telephone terminal and the node during a call between the telephone terminals.

  The information multiplexing method according to the present invention includes a detection step of detecting the silence identifier from the silence compression data portion, and between the silence identifiers in the silence compression data portion based on a detection result of the detection step. And a built-in step of incorporating the information data.

  According to the above method, the information data is incorporated between the silence identifiers detected by the detection means in the incorporation step. As a result, even if the information data is multiplexed, the silence identifier is included at every predetermined interval, so that it is possible to realize multiplexing of the information data even in the telephone system that performs the silence compression process.

  Also, the information separation method according to the present invention separates the information data from the silence identification data based on a detection step of detecting the silence identifier from the multiplexed data and a detection result of the detection step. And a separation step.

  According to the above method, since the information data incorporated between the silence identifiers detected by the detection step is separated from the multiplexed data by the separation step, it is possible to realize separation of the information data from the multiplexed data Play.

  Each means in the information multiplexer can be executed on a computer by an information multiplexing program. Each means in the information demultiplexer can be executed on a computer by an information separation program. Furthermore, by storing the information multiplexing program or the information separation program in a computer-readable recording medium, the information multiplexing program or the information separation program can be executed on any computer.

[Embodiment 1]
An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a schematic configuration of an AMR processing unit on the transmission side in the present embodiment, and FIG. 2 shows a schematic configuration of an AMR processing unit on the reception side. In addition, the solid line in a figure shows the flow of audio | voice data and information data, and the broken line has shown the flow of other various information. The AMR processing units 10 and 20 on the transmission side and the reception side can be provided in a telephone terminal such as a mobile phone terminal, or on a communication network such as a base station or a mail server that performs wireless communication with the mobile phone terminal. It can also be provided in a node.

  As shown in FIG. 1, an AMR processing unit (information multiplexer, speech processing device) 10 on the transmission side includes a speech input unit 11, an AMR code unit (detection unit, silence compression unit, speech coding unit) 12, and a silence detection unit. (Silence detection means) 13, SID frame creation section (replacement means) 14, coded bit string generation section (silence compression means) 15, information data input section 16, information data conversion processing section 17, information data multiplexing section (embedding means) 18 and a voice code data output unit 19. Note that the voice input unit 11, the silence detection unit 13, the SID frame creation unit 14, the encoded bit string generation unit 15, and the voice code data output unit 19 are the conventional voice input unit 101 and silence detection unit 103 shown in FIG. , The SID frame creation unit 104, the encoded bit string generation unit 105, and the speech code data output unit 106 function in the same manner, and the description thereof is omitted.

  The AMR encoding unit 12 transmits the audio data from the audio input unit 11 to the silence detection unit 13 and the SID frame creation unit 14. In addition, the AMR encoding unit 12 receives the silence detection data for notifying the detection of the silence state from the silence detection unit 13, and encodes and encodes the voice data in the sound state based on the received silence detection data. The audio data is transmitted to the encoded bit string generation unit 105. Furthermore, the AMR encoding unit 12 notifies the information data conversion processing unit 17 and the information data multiplexing unit 18 of SID information such as the position of the SID frame (silence identifier) and the type of SID based on the received silence detection data.

  The information data input unit 16 receives information data input from the outside of the AMR processing unit 10 and transmits it to the information data conversion processing unit 17. Here, any data can be used as the information data as long as it is data to be transmitted separately from the audio data. For example, between mobile phone terminals, e-mail, file transfer data, message exchange text data, and the like can be cited. In addition, between mobile phone terminals and base stations, notification data for registered users, such as e-mail from other terminals or to other terminals, teletext in television (TV) broadcasts, Examples include carrier-side control data such as terminal location information.

  The information data conversion processing unit 17 receives information data from the information data input unit 16 and converts it into a predetermined format. The information data conversion processing unit 17 receives SID information from the AMR encoding unit 12, divides the converted information data based on the received SID information, and transmits the divided information data to the information data multiplexing unit 18.

  If the information data multiplexing unit 18 does not receive the SID information from the AMR encoding unit 12 or receives the SID information from the AMR encoding unit 12 but does not receive the information data from the information data conversion processing unit 17, the information data multiplexing unit 18 The AMR speech data is received from the normalized bit string generation unit 15 and transmitted to the speech code data output unit 19. Further, the information data multiplexing unit 18 receives the SID information from the AMR encoding unit 12 and receives information data from the information data conversion processing unit 17, based on the received SID information, the SID frame F · U. By incorporating the information data between them, the AMR voice data and the information data are multiplexed, and the multiplexed data is transmitted to the voice code data output unit 19.

  In the above configuration, the sound data input to the sound input unit 11 is detected by the silence detection unit 13 as to whether it is in a silence state or a sound state. If it is in a sound state, it is encoded by the AMR encoder 12 and converted into a speech frame S by the encoded bit string generator 15. On the other hand, in the silent state, the SID frame F · U generated by the SID frame generation unit 14 and the NO_DATA frame N are converted. The frames S, F, U, and N converted by the encoded bit string generation unit 15 are transmitted to the information data multiplexing unit 18.

  On the other hand, the information data input to the information data input unit 16 is converted into a predetermined format by the information data conversion processing unit 17 and then transmitted to the information data multiplexing unit 18 based on the notification of the SID information. The information data multiplexing unit 18 replaces the NO_DATA frame N with the information data frame I based on the SID information, and outputs the information data frame I to the outside of the AMR processing unit 10 via the speech code data output unit 19.

  FIG. 3 shows a frame structure of multiplexed data. In the figure, frames S, F, and U are the same as in the prior art, and frame I includes information data. As illustrated, in the multiplexed data in the present embodiment, an information data frame I is incorporated between SID frames F and U.

  Note that the bit length of the information data frame I may be 39 bits, which is the same as the SID frame F · U, as in the transmission data amount example 1 shown in FIG. Even in this case, since the position of the SID frame F · U is fixed, the information data frame I can be detected and separated. Further, the bit length of the information data frame I may be a bit length k · m · n different from the audio frame S and the SID frame F · U as in the transmission data amount example 2 shown in FIG. In this case, the information data frame I can be detected and separated by detecting the number of bits of one frame.

  As shown in FIG. 16, in the audio codec processing by AMR, after the SID_FIRST frame F, the interval of the SID_UPDATE frame U is determined to be 3 frames at the beginning and 7 frames after the SID_UPDATE frame U, and data is transmitted correctly. As long as it is, the position of the SID frame is guaranteed. Therefore, the information data multiplexing unit 18 can incorporate the information data frame I between the SID frames F and U by grasping the position of the SID frame from the received SID information, and multiplex the AMR audio data and the information data. Can be realized.

  In the case of the transmission data amount example 1 shown in FIG. 3, if the data transmission rate of the voice frame S is 12.2 kpbs, and if the silent state continues, one SID_UPDATE frame U and seven pieces of information Since the data frame I is transmitted, the average data transmission rate is 1.95 kbps (= 12.2 × (39 × 8) / (244 × 8)).

  Next, the AMR processing unit (information demultiplexer) 20 on the receiving side will be described. As shown in FIG. 2, the AMR processing unit 20 on the receiving side includes a speech code data input unit 21, an information data detection unit (detection unit, separation unit, collation unit) 22, an information data decoding processing unit 23, and an information data output unit. 24, a data string analysis unit 25, an AMR decoding unit 26, an error frame / lost frame processing unit 27, a CNG generation unit 28, and a decoded speech output unit 29. The speech code data input unit 21, the data string analysis unit 25, the AMR decoding unit 26, the error frame / lost frame processing unit 27, the CNG generation unit 28, and the decoded speech output unit 29 are the same as the conventional speech shown in FIG. The code data input unit 111, the data string analysis unit 112, the AMR decoding unit 113, the error frame / lost frame processing unit 114, the CNG generation unit 115, and the decoded speech output unit 116 function in the same manner, and thus description thereof is omitted. .

  The information data detection unit 22 detects and separates information data from the multiplexed data received from the voice code data input unit 21. Specifically, the information data frame I is detected and separated by detecting the SID frame F · U, or the information data frame I is detected and separated by detecting the bit length per frame. can do. In addition, the information data detection unit 22 transmits the separated information data frame I to the information data decoding processing unit 23, and at the same time the multiplexed data or data obtained by separating the information data frame I from the multiplexed data is the data string analysis unit 25. Send to.

  The information data decoding processing unit 23 decodes the information data frame I received from the information data detection unit 22 and transmits the decoded information data to the information data output unit 24. The information data output unit 24 outputs the received information data to the outside of the AMR processing unit 20.

  In the above configuration, the multiplexed data input to the voice code data input unit 21 is separated by detecting the information data frame I by the information data detection unit 22, and the separated information data frame I is decoded by the information data decoding unit. The data is decoded by the processing unit 23 and output via the information data output unit 24.

  On the other hand, each frame of the AMR audio data obtained by separating the information data frame I from the multiplexed data is analyzed by the data string analysis unit 25. If the frame is an error frame or lost frame, it is appropriately processed by the error frame / lost frame processing unit 27, instructs the AMR decoding unit 26, and the AMR decoding unit 26 generates corresponding audio data. On the other hand, if the frame is a SID frame F · U, silence data is generated by the CNG generation unit 28 and transmitted to the AMR decoding unit 26. In addition, if the frame is an audio frame F, the AMR decoding unit 26 performs normal audio decoding processing to generate audio data. These audio data are output to the outside from the AMR decoding unit 26 via the decoded audio output unit 29.

  Therefore, since the information data detection unit 22 can detect the information data frame I by detecting the SID frame F · U or detecting the bit length of one frame, the information data can be separated from the multiplexed data. Can be realized.

[Embodiment 2]
Next, another embodiment of the present invention will be described with reference to FIGS. The cellular phone terminal of this embodiment incorporates the AMR processing units 10 and 20 shown in FIGS. FIG. 4 shows a schematic configuration of a main part of the mobile phone terminal. As shown in the figure, the transmission side block 30 of the mobile phone terminal includes a speech codec processing block (silence compression means) 31, an information data input section 32, a wireless transmission processing section 33, and a wireless data transmission section (transmission means) 34. It is a configuration. The wireless transmission processing unit 33 includes an information data conversion processing unit 35, an information data multiplexing unit (information multiplexer) 36, a channel coding processing unit 37, and a data modulation unit 38.

  The speech codec processing block 31 functions in the same manner as the speech input unit 11, the AMR encoding unit 12, the silence detection unit 13, the SID frame generation unit 14, and the encoded bit string generation unit 15 shown in FIG. The information data input unit 32, the information data conversion processing unit 35, and the information data multiplexing unit 36 function as the information data input unit 16, the information data conversion processing unit 17, and the information data multiplexing unit 18 shown in FIG. To do.

  Therefore, the audio data and information data input from the outside of the transmission side block 30 are the audio codec processing block 31, the information data input unit 32, and the information data conversion processing unit 35, similarly to the AMR processing unit 10 shown in FIG. And the information data multiplexing unit 36. The multiplexed data is converted into a format suitable for wireless transmission by the channel coding processing unit 37 and the data modulation unit 38, and wirelessly transmitted by the wireless data transmission unit 34 to be transmitted through the telephone network 39. . The channel coding processing unit 37 performs CRC addition processing, multistage interleaving processing, convolution processing, rate matching processing, multiplexing processing with other radios, and the like.

  On the other hand, as shown in FIG. 4, the reception side block (reception processing device) 40 of the mobile phone terminal includes a wireless data reception unit (reception unit) 41, a wireless reception processing unit (reception processing unit) 42, and an audio codec processing block. (Voice restoration means) 43 and an information data output unit 44 are provided. The radio reception processing unit 42 includes a data demodulation unit 45, a channel coding processing unit 46, a reception rate determination unit (reception rate determination unit) 47, an information data detection unit (separation unit, information demultiplexer) 48, and an information data decoding unit. The configuration includes a processing unit 49.

  The multiplexed data transmitted through the telephone network 39 is wirelessly received by the wireless data receiving unit 41, converted into the original format by the data demodulating unit 45 and the channel coding processing unit 46, and transmitted to the reception rate determining unit 47. Is done. The reception rate determination unit 47 determines the transmission rate of each received frame, and determines whether the received frame is an appropriate frame based on the determined transmission rate. When it is determined that the frame is appropriate, the received frame is transmitted to the information data detection unit 48. On the other hand, if it is determined that the frame is inappropriate (NG), the received frame is discarded. If the frame is discarded, a retransmission request can be made on the application side.

  Therefore, when the bit length of the information data frame I does not correspond to the bit length of each frame shown in FIG. 17, the reception rate determination unit 47 determines that the frame is an NG frame. In order to prevent this, in the present embodiment, the reception rate determination unit 47 needs to be changed so as to determine that the information data frame I is also an appropriate frame. If the bit length of the information data is 39 bits, which is the same as the bit length of the SID frame F · U, as in transmission data amount example 1 shown in FIG. 3, it is not necessary to change the reception rate determination unit 47.

  The information data detection unit 48, the information data decoding processing unit 49, and the information data output unit 44 function in the same manner as the information data detection unit 22, the information data decoding processing unit 23, and the information data output unit 24 shown in FIG. . The audio codec processing block 43 functions in the same manner as the data string analysis unit 25, AMR decoding unit 26, error frame / lost frame processing unit 27, CNG generation unit 28, and decoded audio output unit 29 shown in FIG. .

  Therefore, in the multiplexed data transmitted by the reception rate determining unit 47, the information data frame I is separated by the information data detecting unit 48, and the separated information data frame I is decoded by the information data decoding processing unit 23, The decrypted information data is output via the information data output unit 24. On the other hand, the AMR audio data from which the information data frame I is separated from the multiplexed data is converted into audio data by the audio codec processing block 43 and output.

  Therefore, the mobile phone terminal of this embodiment can multiplex and transmit voice data and information data during a call, and can separate the received multiplexed data into voice data and information data. Therefore, voice data and information data can be simultaneously communicated with one telephone line.

  In this embodiment, the reception rate determination unit 47 and the information data detection unit 48 are separated. However, when the bit length of the information data frame I is different from other frames, the information data frame I depends on the transmission speed. Therefore, the reception rate determination unit 47 and the information data detection unit 48 can be combined into one.

  Further, a function related to multiplexing of information data can be executed by an audio codec processing block that performs encoding processing of audio data. Specifically, the audio codec processing block 31, the information data input unit 32, the information data conversion processing unit 35, and the information data multiplexing unit 36 of the transmission side block 30 shown in FIG. 4 are replaced with the transmission side block shown in FIG. 50 audio codec processing blocks (audio processing devices) 51 can be collected. In this case, since the wireless transmission processing unit 52 does not need a function related to multiplexing of information data, a conventional wireless transmission processing unit can be used.

  Similarly, a function related to separation of information data can be executed by an audio codec processing block that performs decoding processing of audio data. Specifically, the information data detection unit 48, the information data decoding processing unit 49, the information data output unit 44, and the audio codec processing block 43 of the reception side block 40 shown in FIG. 4 are replaced with the reception side block shown in FIG. 55 speech codec processing blocks 57 can be summarized. In this case, the wireless reception processing unit 56 uses the conventional wireless reception processing unit only by changing the reception rate determination unit 47 so that the reception rate determination unit 47 does not determine the information data frame I as an NG frame. can do.

  Further, as a method for detecting the information data frame, the following methods are conceivable. FIG. 6 shows a data structure including CRC. In the normal processing, as shown in FIG. 5A, all data (for example, 39 bits) in the data portion is a CRC processing target of the wireless processing portions 33 and 42. Therefore, as shown in FIG. 5B, the CRC calculation is changed by adding, for example, one bit of dummy data as a CRC processing target. Therefore, by adding dummy data to the information data frame, the wireless data processing unit 42 can detect the information data frame from the multiplexed data.

  In addition, as a method for changing the CRC calculation, various methods such as reverse use and inversion can be considered, and detection of an information data frame can also be executed by these methods.

  FIG. 7 shows a flow of processing for detecting an information data frame or the like by changing the CRC determination processing. The reception rate determination unit 47 performs CRC determination for rate determination. First, normal CRC determination is performed. If the CRCs match (YES in S1), it is determined as an audio frame, and processing in the audio processing system is performed.

  On the other hand, if the CRCs do not match (NO in S1), the CRC determination regarding the information data frame is performed. If the CRCs match (YES in S2), the information data frame is determined to be processed. On the other hand, if the CRCs do not match (NO in S2), the error frame is determined to be an error frame.

  FIG. 8 shows a flow of processing for detecting an information data frame or the like without changing the CRC determination processing. First, CRC determination is performed. If the CRC does not match (NO in S3), it is determined as an error frame and error processing is performed. On the other hand, if the CRC matches (YES in S3), it is determined whether the SID data is normal and the SID timing is normal. If normal (YES in S4), the voice data If it is determined to be a frame, the processing in the audio processing system is performed.

  FIGS. 9A and 9B show examples in which the same information data is repeatedly incorporated. As described above, by repeating the same information data in advance, the same information data is repeatedly transferred, so that the information data can be reliably transferred.

[Embodiment 3]
Next, still another embodiment of the present invention will be described with reference to FIG. The mobile phone system of this embodiment includes the mobile phone terminal (mobile terminal) shown in FIG. 4 or FIG. FIG. 10 shows a schematic configuration of a main part of the mobile phone system. As shown in the figure, the mobile phone system according to the present embodiment includes two mobile terminals 60 and 63 and base stations 61 and 62 that perform wireless communication with the mobile terminals 60 and 63. Communication between the base stations 61 and 62 is performed via an existing telephone line network.

  In the present embodiment, one mobile terminal 60 is the mobile terminal shown in FIG. 4 or 5 and can multiplex and demultiplex information data. The other mobile terminal 63 is a mobile terminal similar to the conventional mobile terminal. In this embodiment, the base station 61 (node) that performs radio communication with the mobile terminal 60 includes the AMR processing units 10 and 20 shown in FIG. 1 and FIG. Can be multiplexed and separated. Note that the base station 62 that performs wireless communication with the mobile terminal 63 is the same base station as the conventional one.

  According to the above configuration, when performing a voice call between the mobile terminals 60 and 63, voice data is transmitted and received between the mobile terminal and the base stations 60 to 63. At this time, since the mobile terminal 60 and the base station 61 can multiplex and demultiplex information data with each other, the mobile terminal 60 and the base station 61 can transmit and receive voice data incorporating the information data.

  Therefore, information data can be transmitted and received between the mobile terminal 60 and the base station 61 during a call between the mobile terminals 60 and 63. As a result, for example, notification information and service information from the base station 61 to the mobile terminal 60 can be sent, mail can be transmitted, and notification of service request from the mobile terminal 60 to the base station 61 can be sent. It is possible to provide a service that cannot be realized only by voice calls.

[Embodiment 4]
Next, still another embodiment of the present invention will be described with reference to FIG. Compared with the mobile phone system shown in FIG. 10, the mobile phone system of this embodiment uses a base station 65 similar to the conventional one instead of the base station 61, and instead of the conventional mobile terminal 63, FIG. 4. Or the point which is set as the mobile terminal 66 shown by FIG. 5 differs in the other structure. In addition, the same code | symbol is attached | subjected to the structure which has the function similar to the structure demonstrated in the said embodiment, and the description is abbreviate | omitted.

  According to the above configuration, both mobile terminals 60 and 66 can multiplex and demultiplex information data. Therefore, when a voice call is made between the mobile terminals 60 and 66, the mobile terminals 60 and 66 can transmit and receive voice data each incorporating information data. The base stations 62 and 65 recognize voice data and perform transmission / reception in the same manner as in the past.

  Therefore, it is possible to transmit and receive information data between the mobile terminals 60 and 66 during a call between the mobile terminals 60 and 66. As a result, for example, notification of notification information or service information from the mobile terminal to the mobile terminal, notification of service request occurrence, transmission / reception of mail, transfer of files, and the like, services that cannot be realized only by voice calls are possible.

[Embodiment 5]
Next, another embodiment of the present invention will be described with reference to FIGS. The AMR processing unit of this embodiment is different from the AMR processing units 10 and 20 shown in FIGS. 1 and 2 in that a configuration for controlling execution of processing related to multiplexing and separation of information data is provided. Other configurations are the same. In addition, the same code | symbol is attached | subjected to the structure which has the function similar to the structure demonstrated in the said embodiment, and the description is abbreviate | omitted.

  FIG. 12 shows a schematic configuration of the AMR processing unit 70 of the present embodiment. Compared with the AMR processing unit 10 shown in FIG. 1, the AMR processing unit 70 has an information data correspondence control unit (multiplexing control means) 71 that executes the information data conversion processing unit 72 and information in the information data multiplexing unit 73. The difference is that execution of data multiplexing is controlled, and the other configurations are the same.

  Thereby, in the terminal or node provided with the AMR processing unit 70 of this embodiment, it is possible to control whether or not the information data correspondence control unit 71 transmits the information data, and the information data is transmitted without permission. Can be prevented. In addition, by providing the AMR processing unit 70 of the present embodiment on the carrier side, it is possible to prevent the resources on the carrier side from being used arbitrarily on the terminal.

  FIG. 13 shows a schematic configuration of the AMR processing unit 80 of the present embodiment. Compared with the AMR processing unit 20 shown in FIG. 2, the AMR processing unit 80 is configured such that the information data correspondence control unit (information data output control means) 81 executes the separation of information data in the information data detection unit 82 and the information data. The difference is that execution of the decoding processing unit 83 is controlled, and the other configurations are the same.

  Thereby, in the terminal or node provided with the AMR processing unit 80 of the present embodiment, it is possible to control whether or not the information data correspondence control unit 81 receives the information data. Thereby, it is possible to refuse reception of undesired information data such as a computer virus.

  The AMR processing units 10, 20, 70, 80, transmission processing blocks 30, 50, and reception processing blocks 40, 55 provided in telephone terminals and nodes may be configured by hardware logic. As described above, it may be realized by software using a CPU.

  That is, a telephone terminal or a node has a central processing unit (CPU) that executes instructions of a control program that realizes each function, a read only memory (ROM) that stores the program, and a random access memory (RAM) that expands the program And a storage device (recording medium) such as a memory for storing the program and various data. An object of the present invention is a recording medium on which a program code (execution format program, intermediate code program, source program) of a control program of the data recording apparatus 10 which is software that realizes the above-described functions is recorded so as to be readable by a computer. This can also be achieved by supplying the data recording apparatus 10 and reading and executing the program code recorded on the recording medium by the computer (or CPU or MPU).

  Examples of the recording medium include a tape system such as a magnetic tape and a cassette tape, a disk system including a magnetic disk such as a flexible disk / hard disk and an optical disk such as a CD-ROM / MO / MD / DVD / CD-R, and an IC card. A card system such as an optical card (including a memory card) or a semiconductor memory system such as a mask ROM / EPROM / EEPROM / flash ROM can be used.

  Further, a telephone terminal or a node may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication. A net or the like is available. Further, the transmission medium constituting the communication network is not particularly limited. For example, even in the case of wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL line, infrared rays such as IrDA and remote control, Bluetooth, It can also be used with radio such as 802.11 radio, HDR, mobile phone network, satellite line, and terrestrial digital network. The present invention can also be realized in the form of a carrier wave or a data signal sequence in which the program code is embodied by electronic transmission.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims. Further, the present invention can be obtained by appropriately combining technical means disclosed in different embodiments. Embodiments are also included in the technical scope of the present invention.

  According to the present invention, it is possible to exchange information data without changing the current voice codec processing or the telephone system itself, that is, without incurring a large modification cost. This makes it possible to provide a new service in a digital wireless terminal or other portable terminal equipped with a silence compression process.

It is a block diagram which shows schematic structure of the AMR process part of the transmission side in one Embodiment of this invention. It is a block diagram which shows schematic structure of the AMR process part of the receiving side in the said embodiment. It is a time chart which shows the time transition of the multiplex data output from the said AMR process part on the transmission side. It is a block diagram which shows schematic structure of the principal part of the mobile telephone terminal which is another embodiment of this invention. It is a block diagram which shows the modification of the said mobile telephone terminal. It is a figure which shows the data structure containing CRC in a flame | frame, The figure (a) has shown the normal data structure, The figure (b) is the data which added the dummy data in order to identify information data The structure is shown. It is a flowchart which shows the flow of the process which detects a data frame etc. by changing a CRC determination process. It is a flowchart which shows the flow of the process which detects an information data frame etc., without changing a CRC determination process. It is a figure which shows the data content of an information data frame, The figure (a) shows the example in which one information data frame is repeated, The figure (b) shows the example repeated for every some information data Yes. It is a block diagram which shows schematic structure of the mobile telephone system which is another embodiment of this invention. It is a block diagram which shows schematic structure of the mobile telephone system which is another embodiment of this invention. It is a block diagram which shows schematic structure of the AMR process part by the side of a transmission in another embodiment of this invention. It is a block diagram which shows schematic structure of the AMR process part on the receiving side in further another embodiment of this invention. It is a block diagram which shows schematic structure of the AMR process part of the transmission side in a prior art. It is a block diagram which shows schematic structure of the AMR process part of the receiving side in a prior art. It is a time chart which shows the time transition of the AMR audio | voice data output from the said AMR process part on the transmission side. It is a figure which shows the bit number of various flame | frames with a table format in an AMR audio | voice codec. It is a figure which shows the data structure of a SID frame in a table format. It is a figure which shows the correspondence of a class, coding for error correction, and CRC in a table format.

Explanation of symbols

51 Audio codec processing block (Audio processing device)
61 Base station (node)
71 Information Data Corresponding Control Unit (Multiplexing Control Unit)
81 Information Data Corresponding Control Unit (Information Data Output Control Unit)
F ・ U SID frame (silent identifier)

Claims (21)

An information multiplexer that multiplexes silence-compressed data obtained by silence-compressing sound data and information data different from the sound data,
The silence compression data is a silence data portion that is a voice data portion in a silent state that is not producing a voice converted into a silence compression data portion that includes a silence identifier indicating the silence state at predetermined intervals.
Detecting means for detecting the silence identifier;
Incorporating means for incorporating the information data between the silence identifiers in the silence compressed data portion based on the detection result of the detection means ,
The silence compression data part in which the information data is incorporated by the incorporation means is composed of a plurality of frames.
An information multiplexer characterized in that a frame including the silence identifier has a different CRC (Cyclic Redundancy Check) data structure or SID (Silence Descriptor) timing than a frame including a part of the information data . Normal CRC determination is performed. If the CRC matches, it is determined to be a voice frame and processing in the voice processing system is performed.
If the CRC does not match in the normal CRC determination, perform a CRC determination on the information data frame,
If the CRC for the information data frame matches, it is determined as an information data frame and information data processing is performed.
The information multiplexer according to claim 1, further comprising: a reception rate determination unit that performs a CRC determination process of determining an error frame and performing an error process when CRCs related to the information data frame do not match. A reception rate determination unit for performing CRC determination processing;
If the CRC does not match, it is determined as an error frame and error processing is performed.
If the CRC matches, determine whether the SID data is normal and the SID timing is normal,
If the SID timing is normal, it is determined as an audio data frame and processing in the audio processing system is performed.
If the SID timing is not normal, it is determined as an information data frame and information data processing is performed.
The information multiplexer according to claim 1. 4. The information multiplexer according to claim 1, wherein the incorporating means repeatedly incorporates the same information data. 4. The information multiplexer according to claim 1, further comprising multiplexing control means for controlling multiplexing of the silence compressed data and the information data by the built-in means. Silence compression means for silently compressing input voice data, silence compression data that is voice data silence-compressed by the silence compression means, and multiplexing means for multiplexing information data different from the voice data A voice processing device comprising:
The silent compression means is
Silence detection means for detecting that the input voice data portion is a silent data portion that is a silent voice data portion that does not speak,
A replacement means for replacing the silence data portion detected by the silence detection means in the audio data with a silence compressed data portion including the silence identifier indicating the silence state at predetermined intervals;
The multiplexing means is
Incorporating position information of the silence identifier in the silence compressed data portion from the replacement means, and incorporating the information data between the silence identifiers in the silence compressed data portion based on the acquired position information Means and
The silence compression data part in which the information data is incorporated by the incorporation means is composed of a plurality of frames.
An audio processing device, wherein a frame including the silence identifier has a different CRC data structure or SID timing than a frame including a part of the information data. The speech processing device according to claim 6, wherein the silence compression means further comprises speech encoding means for encoding input speech data. An information demultiplexer for separating multiplexed data obtained by multiplexing silence-compressed data obtained by silence-compressing sound data and information data different from the sound data,
The silence compression data is a silence data portion that is a voice data portion in a silent state that is not producing a voice converted into a silence compression data portion that includes a silence identifier indicating the silence state at predetermined intervals.
The multiplexed data is obtained by incorporating the information data between the silence identifiers in the silence identification data portion,
Detecting means for detecting the silence identifier from the multiplexed data;
Separation means for separating the information data from between the silence identification data based on the detection result of the detection means;
The multiplexed data consists of a plurality of frames,
Utilizing the fact that the data structure of the frame including the silence identifier is different from the frame including a part of the information data, the detection means detects the frame including the silence identifier, and the separation means is the information data. Separate the frame containing part of the
An information demultiplexer characterized in that a frame including the silence identifier has a different CRC data structure or SID timing than a frame including a part of the information data. The multiplexed data is data in which the same information data is repeatedly incorporated,
9. The information demultiplexer according to claim 8 , further comprising collating means for collating repeated portions of the information data separated by the separating means. The information demultiplexer according to claim 9 , further comprising information data output control means for controlling output of the information data separated from the multiplexed data. Receiving processing means for receiving multiplexed data obtained by multiplexing silence-compressed data obtained by silence-compressing audio data and information data different from the audio data; and multiplexed data received by the receiving processing means A reception processing device comprising separation means for separating the data into each data,
The silence compression data is a silence data portion that is a voice data portion in a silent state that is not producing a voice converted into a silence compression data portion that includes a silence identifier indicating the silence state at predetermined intervals.
The multiplexed data is obtained by incorporating the information data between the silence identifiers in the silence identification data portion,
The reception processing means further includes reception rate determination means for determining a reception rate of each part of the multiplexed data,
The separation means separates the silence compression data and the information data based on the difference in the reception rates determined by the reception rate determination means ,
The multiplexed data consists of a plurality of frames,
Utilizing the fact that the data structure of the frame including the silence identifier is different from the frame including a part of the information data, the detection means detects the frame including the silence identifier, and the separation means is the information data. Separate the frame containing part of the
The reception processing device , wherein a frame including the silence identifier has a different CRC data structure or SID timing than a frame including a part of the information data . Silence compression means for silently compressing audio data;
The information multiplexer according to claim 1, wherein the silence compression data silence-compressed by the silence compression means and information data different from the audio data are multiplexed.
Transmitting means for transmitting multiplexed data multiplexed by the information multiplexer;
Receiving means for receiving multiplexed data;
The information demultiplexer according to claim 8 or the reception processing device according to claim 11, wherein the multiplexed data received by the receiving means is separated into the silence compression data and the information data.
A telephone terminal comprising voice restoration means for restoring the silence-compressed data separated by the information demultiplexer to the original voice data. 13. The telephone terminal according to claim 12, further comprising the voice processing device according to claim 6 in place of the silence compression means and the information multiplexer. A node capable of communicating with the telephone terminal according to claim 12 or 13,
Receiving means for receiving multiplexed data from the telephone terminal;
The information demultiplexer according to claim 8 or the reception processing device according to claim 11, wherein the multiplexed data received by the receiving means is separated into the silence compression data and the information data.
The information multiplexer according to claim 1, wherein the silence compression data and information data different from the audio data are multiplexed.
A node comprising: transmission means for transmitting multiplexed data multiplexed by the information multiplexer to the telephone terminal.   A telephone system in which a plurality of telephone terminals according to claim 12 or 13 are connected via a communication network.   The telephone system according to claim 15, wherein the communication network includes the node according to claim 14. An information multiplexing method for multiplexing silence-compressed data obtained by silence-compressing sound data and information data different from the sound data,
The silence compression data is a silence data portion that is a voice data portion in a silent state that is not producing a voice converted into a silence compression data portion that includes a silence identifier indicating the silence state at predetermined intervals.
Detecting the silence identifier from the silence compressed data portion;
Based on the detection result of the detecting step, between the adjacent the silent identifier in the silence compression data part, viewed contains a built-in step of incorporating the information data,
The silence compression data part in which the information data is incorporated in the incorporation step is composed of a plurality of frames.
An information multiplexing method, wherein a frame including the silence identifier has a different CRC data structure or SID timing than a frame including a part of the information data . An information separation method for separating multiplexed data obtained by multiplexing silence-compressed data obtained by silence-compressing voice data and information data different from the voice data, into each data,
The silence compression data is a silence data portion that is a voice data portion in a silent state that is not producing a voice converted into a silence compression data portion that includes a silence identifier indicating the silence state at predetermined intervals.
The multiplexed data is obtained by incorporating the information data between the silence identifiers in the silence identification data portion,
A detection step of detecting the silence identifier from the multiplexed data;
Based on the detection result of the detecting step, it sees contains a separation step of separating the information data from between the silent identification data with each other,
The silence compression data part in which the information data is incorporated in the incorporation step is composed of a plurality of frames.
An information separation method, wherein a frame including the silence identifier has a different CRC data structure or SID timing than a frame including a part of the information data . An information multiplexing program for operating the information multiplexer according to claim 1, any one of 5, information multiplexing program for causing a computer to function as each means described above. 11. An information separation program for operating the information demultiplexer according to any one of claims 8 to 10, wherein the information separation program causes a computer to function as each of the means.   A computer-readable recording medium on which the information multiplexing program according to claim 19 or the information separation program according to claim 20 is recorded.

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