KR100244217B1 - The equipment and the method of transmitting and receiving both voice and data at the same time - Google Patents

Abstract

The present invention relates to the transmission and reception of voice and information data in portable mobile communication. In particular, a voice frame is output when the input signal is voice, and an SID frame is output when the voice is not voice. Some background bits of the SID frame record background noise information. In the bit, the information data desired to be transmitted is recorded and transmitted through the traffic channel. If the transmitted frame is a voice frame, the audio signal is generated through the decoding process. If the SID frame is used, the background noise is generated by extracting information necessary for the background noise. By simultaneously extracting and restoring additionally included information data, if there is no voice data during a call, only the background noise is transmitted through the SID frame, but the present invention provides a fax, an e-mail, a voice mail, and a message in a section where there is no voice signal. Currency, useful information such as binary files It can also transmit while improving the service of the GSM network, thereby increasing the product's competitiveness.

Description

Voice and data simultaneous transmitting and receiving device and method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for transmitting and receiving voice and information data in a portable mobile communication. In particular, the present invention relates to recording a piece of information data such as a text in a part of an SID frame that is applied to GSM plate speech coding, together with background noise information. The present invention relates to an apparatus and a method for transmitting and receiving voice and data simultaneously so that a receiving side receives the same when transmitting.

The spread and development of mobile communication devices such as portable mobile phones and PHS (Personal Handyphone System) is progressing rapidly. In addition, various mobile communication voice coding methods have been standardized in consideration of conditions such as low bit rate and good voice quality, robustness against transmission error, and resistance to ambient noise. In other words, starting with Global System For Mobile Communications (GSM) full rate, each standardization of full rate and half rate (how the bit rate is 1/2 of the full rate) in Europe, North America, Japan, etc. It's going on. GSM is a digital cellular service covering more than 190 operators, including more than 100 countries, including Europe, Africa, the Middle East, and APAC countries.It started its service in 1992 and has more than 100 million GSM subscribers in 2000. It is expected. The GSM full rate voice coding algorithm operates with RPE-LTP (Regular Pulse Excitation-Long Term Predictive Coding; 22.8K / bps source + error correction), Voice Activity Detection (VAD) and Discontinuous Transmission (DTX) algorithms.

That is, as shown in FIG. 1, a voice spoken by a person is encoded by the RPE-LTP encoder 11 of a transmitter, and the encoded voice information is transmitted to a receiver through a traffic channel. At this time, during the call, the voice is divided into the silent part and the silent part between the story, so when the encoding of the voice is performed by the VAD algorithm 12, it is measured whether or not the speech (Speech) is actually input. If it is determined by the VAD algorithm 12 that the input signal is speech, the VAD flag is set to 1 and input to the TX / DTX processor 13, and if it is determined that the voice is not voice, the VAD flag is reset to 0 and the TX is reset. It is input to the / DTX processing unit 13. If the VAD flag is 1, the TX / DTX processor 13 determines that the input signal is voice and transmits the voice frame through the traffic channel. If the VAD flag is 0, the TX / DTX processor 13 judges that the voice is not voice. 260-bit Silence Descriptor Frame (SID) frames with information) are transmitted over the traffic channel.

At this time, the RX high frequency subsystem 20 on the receiving side as shown in FIG. 2 detects and corrects an error in the error correction and detection unit 21 for the transmitted frame, and the SID frame detector 22 is inputted. After detecting whether the frame is an audio frame or an SID frame, the RX DTX processing unit (260 bit information data, which is a traffic frame, a bad frame indicator (DFI) flag indicating an error frame, and a SID flag indicating whether the frame is an audio frame or an SID frame) are used. 30 to voice decoder 32. The voice decoder 32 generates an audio signal by decoding the traffic frame of 260 bits when the input SID flag indicates that the voice frame is a voice frame. On the other hand, if the SID flag indicates the SID frame, the voice decoder 32 extracts the background noise information from the SID frame and outputs the background noise information to the background noise calculator 31, and uses the value calculated by the noise calculator 31 to determine the background. Generates noise. Here, the SID flag and the BFI flag are flags for indicating the status of the current frame, which are described in detail in the ETSI GSM 06.31 Recommendation Document.

At this time, the SID frame generated by the full rate codec of the TX / DTX processor 13 has the same structure as in FIG. 3 and is composed of 260 bits. Here, the actual speech uses all the allocated 260 bits, but the number of bits actually used among the 260 bits is 36 bits of the filter parameter, 8 bits of the subframe (LTP) gain, and the SID codeword. 95 bits, total 139 bits, which is needed to make background noise in the decoder. The remaining 121 bits of the 260 bits are all reset to 0 and do not play any role.

An object of the present invention is to provide an apparatus and method for simultaneously transmitting and receiving voice and data, which transmits and receives information data desired to be transmitted with background noise information while a user talks on a bit which is not used in SID frame transmission.

According to the present invention for achieving the above object, a voice and data simultaneous transmission apparatus encodes information data desired to be transmitted according to an information data flag state when the VAD flag indicating whether an input signal is voice is not voice. And a data transmitter for outputting an extended SID flag indicating the same, and a normal SID frame or background noise information and additional information data in which only voice frame or background noise information is recorded according to the state of the VAD flag and the extended SID flag. And a processing unit for transmitting the extended SID frame.

According to an embodiment of the present invention, when a frame is transmitted through a traffic channel, the apparatus for receiving voice and data simultaneously determines whether an input frame is a voice frame, an SID frame in which background noise information is recorded, or an extended SID frame in which background noise information and additional data information are recorded. A high frequency subsystem that outputs an SID flag, an extended SID flag, and an audio signal by decoding the speech frame if the SID flag state indicates a voice frame, and generates a background signal from the SID frame if the SID frame indicates a voice frame. Background information is generated by extracting the information about, and when the extended SID frame is indicated, the decoder extracts information necessary for background noise from the extended SID frame to generate background noise and simultaneously extracts and restores additional information data. It is characterized by.

In the simultaneous transmission and reception of voice and data according to the present invention, if the input signal is voice, encoding the same and transmitting the voice frame, and if the input signal is not voice, writes information data desired to be transmitted in some bits of the SID frame. Recording and transmitting background noise information in the remaining bits; decoding the received frame if the received frame is voice; generating an audio signal; and generating background noise by extracting the background noise information if the received frame is a SID frame; And extracting and restoring additionally recorded information data at the same time.

1 is a block diagram of a transmission side of a conventional digital portable communication;

Fig. 2 is a block diagram of the receiving side of conventional digital portable communication.

3 is a view showing the structure of an SID frame in FIG.

4 is a block diagram of an apparatus for transmitting voice and data simultaneously according to the present invention;

5 is an operation flowchart of an extended DTX processor in FIG. 4;

6 is a block diagram of an apparatus for simultaneously receiving voice and data according to the present invention;

7 is an operation flowchart of a voice decoder in FIG.

Explanation of symbols for main parts of the drawings

41: encoder 42: VAD algorithm

43: data transmission unit 44: extended DTX processing unit

50: high frequency subsystem 60: DTX processing unit

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is a configuration block diagram of an apparatus for transmitting voice and data simultaneously according to the present invention, and FIG. 5 is a configuration block diagram of a reception apparatus.

The transmitting side as shown in Fig. 4 is composed of an RPE-LTP encoder 41, a VAD algorithm 42, a data transmitter 43, and an extended DTX processor 44.

In the present invention configured as described above, a voice spoken by a person during a call using a portable mobile communication device is coded by the RPE-LTP encoder 11 on the transmitting side, and the coded voice information is output to the expansion DTX processor 44. When the voice coding is performed, the VAD algorithm 42 determines whether a speech is actually being input or is silent, and if it is determined that the speech is speech, the VAD flag is set to 1 to set the VAD flag to 1 to expand the DTX processor 44. If it is determined that the voice is not negative, the VAD flag is reset to 0 and output to the extended DTX processor 44. On the other hand, the data transmission unit 43 outputs the information data desired by the user to the extended DTX processing unit 44 according to the presence or absence of the information data flag set by the user's selection or the like and the state of the VAD flag of the VAD algorithm 42. That is, when the information data flag is set to 1, information transmission is possible, and when reset to 0, information transmission is not possible or information transmission is completed. Therefore, the data transmission section 44 sets the extended SID flag to 1 when the information data flag is set to 1, and outputs the information data, and sets the extended SID flag to 0 when the information data flag is reset to 0. The reset is output to the extended DTX processor 44. Here, the information data is text, video, audio information such as FAX, e-mail, voice mail, binary file, message, and the like.

As shown in FIG. 5, the extended DTX processor 44 determines whether the VAD flag is 0 or 1 (step 501). When the VAD flag is 1, the extended DTX processor 44 uses the allocated 260 bits because voice is present. In step 505, the 260-bit speech frame coded by the encoder 41 is transmitted through the traffic channel.

On the other hand, if it is determined in step 501 that the VAD flag is 0, since there is no voice at this time, the remaining 121 bits can be used and the user can transmit desired information. That is, it is determined whether the extended SID flag output from the data transmission unit 43 is 0 or 1 (step 502). If it is determined as 0, the SID codeword and the background noise data are added to the unique bit field (ie, 139 bits). Record and transmit over the traffic channel. At this time, 121 bits are not used.

In addition, if it is determined in step 502 that the extension SID flag is 1, information data such as an e-mail transmitted from the data transmission unit 43 is recorded in the extension SID bit field (that is, 121 bits) (step 503), and a unique bit After recording the SID codeword and the background noise data in the field (i.e., 139 bits) (step 504), an extended SID frame of 260 bits in total is transmitted over the traffic channel.

At this time, while the extended SID flag is set, 260 bits input to the high frequency subsystem are recognized as a speech, and the information data flag is set until all data is transmitted. That is, the transmitted bit confirms the transmission of all bits using the following counter.

size_of_data = xxx;

data_left = size_of_data

if (data_left ≤ 0)

Information data flag = 0;

else

{data_left = data_left-121;

Information data flag = 1;

write_to_ext_bit_field ();

}

here,

data_left is the data remaining when transmitting information data,

size_of_data is the total size of the data when the information data is sent,

write_to_ext_data_field () is a function that allows data to be written to an extended data field in an extended SID frame.

That is, if the information data desired to be transmitted does not remain, the information data flag is reset to 0. If the information data flag is left, 121 is removed, the information data flag is kept at 1, and the information data is recorded in the extended data field. The subtraction of 121 is because information data is transmitted in units of 121 bits.

On the other hand, in the RX high-frequency subsystem 50 on the receiving side as shown in FIG. 6, the error correction and detection unit 51 detects an error and performs correction on the transmitted frame, and the SID frame detection unit 52 performs a voice input. SID or SID frame, it detects whether it is a normal SID frame or an extended SID frame in which information data is recorded, and then indicates 260 bits of information data as a traffic frame, a DFI flag indicating an error frame, and whether it is a voice or SID frame. The SID flag and an extended SID flag indicating whether the normal SID frame or the extended SID frame are transmitted are transmitted to the voice decoder 62 of the RX DTX processing unit 60.

If the SID flag is 0 as shown in FIG. 7 (step 701), the voice decoder 62 decodes the 260-bit traffic frame and generates an audio signal by discriminating the voice frame regardless of the extended SID flag. (Step 705). On the other hand, if the SID flag is 1, it is determined that the transmitted frame is not a voice frame, and it is determined whether the extended SID frame is 0 or 1 (step 702). In step 702, if the extended SID frame is 0, it is determined that the normal SID frame is transmitted, and the background noise parameter and the SID codeword recorded in 139 bits of the SID frame are extracted and output to the noise calculator 62, and the noise calculation is performed. Background noise is generated using the value calculated in section 62 (step 704). On the other hand, if the extended SID flag is 1 in step 702, it is determined that the information data is additionally recorded and transmitted, and extracted and restored the extended SID word and related information data included in 121 bits of the extended SID frame (step 703), Background noise is generated by extracting the background noise parameter and the SID codeword recorded in 139 bits (step 704).

On the other hand, the present invention is not limited to GSM but can be applied to all systems applied to digital cellular phones. That is, it can be applied to Japan (PDC) full rate, half rate, Europe (GSM) full rate, half rate, North American (TIA) full rate, and the like. In this case, only the number of bits of the SID frame in which the additional information data is recorded varies depending on each system and speech coding scheme.

As described above, according to the apparatus and method for simultaneously transmitting and receiving voice and data according to the present invention, if there is no voice data during a call, only the background noise is transmitted through the SID frame, but the present invention provides a fax, an e-mail, It can send useful information such as voicemail, messages, binary files, etc. In fact, a considerable amount of time is required to transmit a SID frame when a call is made, so that data can be transmitted using an extended SID frame while talking. Therefore, the service of the GSM network can be improved to increase the competitiveness of the product.

Claims (9)

When a signal is input to the voice and data simultaneous transmission device in a portable mobile communication device including an encoder that encodes it and a VAD algorithm that determines whether the input signal is real voice or background noise and changes the state of the VAD flag. In A data transmitter for encoding and outputting information data to be transmitted according to a state of an information data flag indicating whether information transmission is possible when the VAD flag is not voice, and outputting an extended SID flag indicating this; And a processor for transmitting a voice frame according to the VAD flag and the extended SID flag state, transmitting a normal SID frame in which only background noise information is recorded, or transmitting an extended SID frame in which background noise information and additional data are recorded. A simultaneous voice and data transmission device. The method of claim 1, wherein the processing unit And some information of the background noise is recorded in some bits of the extended SID frame, and the information data output from the data transmitter is recorded and transmitted in the remaining bits. The information data flag input to the data transmission unit is A voice and data simultaneous transmission device characterized by maintaining a set state while information data to be transmitted remains. When a frame is transmitted through a traffic channel, a high frequency subsystem that determines whether it is a voice frame or an SID frame with background noise information recorded therein and outputs a SID flag indicating this, and if the SID flag state indicates a voice frame, decodes the voice frame. An apparatus for receiving audio and data simultaneously in a portable mobile communication device having a decoder for generating an audio signal by generating an audio signal, and extracting information on background noise from the SID frame when generating an audio signal. The high frequency subsystem determines whether the transmitted frame is a normal SID frame or an extended SID frame in which additional data is recorded, and outputs an extended SID flag indicating this. When the extended SID flag state indicates an extended SID frame, the decoder extracts information necessary for background noise from the extended SID frame to generate background noise, and simultaneously extracts and restores additional information data. Simultaneous receiving device. If the input signal is voice, encoding the same and transmitting the same as a voice frame; Transmitting an SID frame if the input signal is not voice, recording some information data to be transmitted in some bits of the SID frame and recording background noise information in the remaining bits; If the received frame is a voice frame, decoding the frame to generate an audio signal; And if the received frame is an SID frame, extracting background noise information to generate background noise and extracting and restoring additionally recorded information data. A first step of encoding and transmitting a signal when it is input; A second step of determining whether or not the input signal is real voice and changing the state of the VAD flag indicating this; A third step of encoding and outputting information data to be transmitted according to an information data flag state indicating whether information transmission is possible when the state of the VAD flag is not voice, and outputting an extended SID flag indicating this; And a fourth step of transmitting a normal SID frame in which only voice frame or background noise information is recorded or an extended SID frame in which background noise information and additional information data are recorded according to the VAD flag and the extended SID flag state. The simultaneous voice and data transmission method. The method of claim 6, wherein the information data flag is A voice and data simultaneous transmission method characterized by maintaining a set state while information data to be transmitted remains. The method of claim 6, wherein the fourth step And some information of background noise is recorded in some bits of the extended SID frame, and information data output from the data transmitter is recorded and transmitted in the remaining bits. Determining whether a voice frame or a SID frame in which background noise information is recorded when a frame is transmitted through a traffic channel, and outputting a SID flag indicating a determination result; A second step of determining whether the SID frame is a normal SID frame in which only background noise information is recorded or an extended SID frame in which background noise information and additional data are recorded together, and outputting an extended SID flag indicating this; A third step of decoding the voice frame to generate an audio signal when the SID flag state of the first step indicates a voice frame; A fourth step of extracting information on the background noise from the SID frame to generate the background noise when the SID flag state of the first step indicates the SID frame; If the extended SID flag state output in the second step indicates the extended SID frame, the fifth step of extracting and restoring information necessary for the background noise from the extended SID frame and extracting and restoring additionally included information data is performed. Simultaneous reception of voice and data comprising a.

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