JP2001257618A - Portable telephone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable telephone system that can apply a voice CODEC section to a telephone mode and a multimedia communication mode so as to use the voice CODEC section in common for even a video telephone or the like thereby reducing the cost. SOLUTION: A wireless access control section 104 receives control data for call control or the like processed by a channel CODEC section 103 and applies protocol processing to the control data. Furthermore, the wireless access control section 104 instructs the channel CODEC section 103 to output data to a multimedia demultiplexer section 105 or the wireless access control section 104 in response to a bearer of U plane data decided by protocol processing of user data or the call control as required. The multimedia demultiplexer section 105 demultiplexes multimedia data that are multiplexed data of voice, image and text.file or the like and outputs the demultiplexed data to the voice CODEC section 106 and an external interference section 107.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone device for realizing multimedia communication, for example, a video telephone.

[0002]

2. Description of the Related Art For realizing multimedia communication, for example, a videophone function in a portable telephone terminal, there are two conventional techniques.・ Integrated videophone device: Technology for integrating the wireless control unit and videophone processing unit
Separate videophone device: Technology that separates the wireless control unit (mobile phone) from the videophone processing unit

In particular, in the case of the latter technique, multiplexed multimedia data received from a network is transmitted in an unaltered data format through an interface specified for videophone processing. The telephone processing unit multiplexes and demultiplexes the multimedia data using the predetermined interface, and sends the data to various processing units (sound, data, image) for each medium and processes the media.

[0004]

SUMMARY OF THE INVENTION In the above-mentioned separated type videophone device, when the voice codec used as a mobile phone and the voice codec used in videophone communication are the same, the separated videophone according to the prior art is used. In the device, it is necessary to mount the same voice codec on the mobile phone side and the videophone processing unit in separate devices. Further, when the voice communication by the mobile phone and the multimedia communication by the video phone are exclusive, there is a problem that the voice codec of the mobile phone is stopped in the video phone mode.

An object of the present invention is to enable a voice codec to be used in a telephone mode or a multimedia communication mode so that a voice codec can be shared with a videophone or the like, thereby reducing the cost of a portable telephone. It is to provide a device.

[0006]

In order to solve the above problems, a portable telephone device according to the present invention comprises an RF processor for modulating and demodulating an RF signal, and a data signal input / output to / from the RF processor in accordance with a wireless system. A baseband signal processing unit that performs baseband processing, a channel codec unit that performs codec processing for each radio channel on a data signal input to and output from the baseband signal processing unit, and a multimedia data including audio data. Multiplexing / demultiplexing unit for performing multiplexing / demultiplexing, an audio codec unit for performing codec processing on audio data input / output to / from the multimedia multiplexing / demultiplexing unit or an audio input / output device, and an external terminal for processing multimedia data An external interface unit for connecting to the device, performs protocol processing of data signals, and Le codec unit, characterized in that it comprises a radio access control unit for controlling the input and output processing of data signals between the multimedia demultiplexer and an external interface unit.

Further, in the portable telephone device according to the present invention, the wireless access control unit negotiates in advance with a base station or a communication partner terminal in a protocol process that the wireless access control unit transmits multimedia data on a wireless data transmission / reception channel. Is determined by the following.

In the portable telephone device according to the present invention, the radio access control unit may be configured to negotiate a protocol with a base station or a terminal of a communication partner in a negotiation with the channel codec unit, the multimedia demultiplexing unit and the external interface unit. And determining the input / output of a data signal during the period.

Further, the radio access control unit controls the multimedia multiplexing / demultiplexing unit so as not to process the voice data by the negotiation in the case of only voice communication. In this case, a speaker may be connected to the audio codec unit, and audio encoded data input from the external terminal via the external interface unit may be decoded by the audio codec unit and output to the speaker. Further, a microphone may be connected to the audio codec unit, and audio encoded data input from the microphone and encoded by the audio codec unit may be output to the external terminal.

According to the present invention, it is not necessary to incorporate an audio codec into an external terminal serving as a videophone processing unit in a separate type videophone device, and cost can be reduced. In a videophone mode or the like, the mobile phone unit of the present invention can be used as a handset for voice communication.

[0011]

FIG. 1 is a block diagram showing an embodiment of a portable telephone device according to the present invention. In FIG. 1, a mobile phone device 100 includes an antenna unit 108 and an RF unit.
An RF processing unit 101 that modulates and demodulates a signal; a baseband signal processing unit 102 that performs baseband processing according to a wireless scheme on a data signal input to and output from the RF processing unit;
A channel codec section 103 for performing codec processing for each radio channel on a data signal input to and output from the baseband signal processing section; and a multimedia demultiplexing section 105 for multiplexing / demultiplexing multimedia data including audio data. An audio codec unit 106 for performing codec processing on audio data input to and output from the multimedia demultiplexing unit or the audio input / output device; and an external interface unit 107 for connecting to an external terminal for processing multimedia data. , Performs the protocol processing of the data signal, and performs the channel codec section 10
3. a wireless access control unit 104 for controlling input / output and processing of data signals between the multimedia demultiplexing unit 105 and the external interface unit 107; A microphone and a speaker are connected to the audio codec unit 106, and a videophone as an external terminal is connected to the external interface unit 107.

First, the operation of each unit when receiving a signal from the antenna 108 will be described. The wireless access control unit 104 performs negotiation in protocol processing with a base station or a communication partner terminal in advance. The RF processing unit 101 demodulates the RF signal received from the antenna 108, and
Performs AD conversion on the demodulated signal and performs baseband signal processing according to the wireless system. In this way, the data is formatted for each radio channel by the baseband signal processing unit 102 and input to the channel codec unit 103, where the data is decomposed. Further, the channel codec unit 103 detects the changed bit using the determined error correction code, corrects the changed bit, corrects the bit, and according to the radio channel or according to an instruction from the radio access control unit 104, the multimedia demultiplexing unit 105. Alternatively, data is output to wireless access control section 104.

[0013] Radio access control section 104 receives control data (hereinafter referred to as C plane data) such as call control processed by channel codec section 103, and receives layer 2 data.
And a layer 3 protocol process. Also, if necessary, the channel codec unit 103 is provided with a layer 2 protocol process for user data (hereinafter referred to as U plane data) and a U plane data bearer determined in call control. It instructs the multimedia demultiplexing unit 105 or the wireless access control unit 104 to output data.

The multimedia demultiplexing unit 105
Separates multimedia data in which data such as voices, images, text files and the like are multiplexed, and outputs the separated data to the audio codec unit 106 and the external interface unit 107.

The audio codec unit 106 decodes audio data to perform PCM decoding and DA conversion and output an analog audio signal to a speaker. The external interface unit 107 includes an external terminal such as a PC (Personal Computer).
ter), a physical / electrical / logical interface process for connection with a PDA (Personal Digital Assistants) and the like.

Next, the operation of each unit when transmitting a signal from the antenna 108 will be described. The wireless access control unit 104 determines in advance that the multimedia data is to be transmitted on the wireless data transmission / reception channel by negotiation in the protocol processing with the base station or the communication partner terminal.

The external interface unit 107 is connected to an external terminal, for example, a PC, PDA, or the like, and performs physical, electrical, and logical interface processing, and receives a signal. Also, the audio codec unit 106 performs AD conversion and PCM encoding on the analog audio signal input from the microphone.

Voices, images, texts and the like input from the external interface unit 107 and the audio codec unit 106
Multimedia multiplexing / demultiplexing unit 10 for data such as files
5 is multiplexed. Then, the channel codec 103
In, data is assembled into a predetermined format for each wireless channel, and encoding is performed according to the predetermined error correction code. Baseband signal processing unit 102
In, the digital signal input from the channel codec section 103 is subjected to baseband signal processing according to the wireless system, and D / A conversion is performed. This analog signal is modulated into an RF signal by the RF processing unit 101 and transmitted from the antenna 108.

As described above, the wireless access control unit 104
Determines input / output of a data signal between the channel codec unit 103, the multimedia demultiplexing unit 105, and the external interface unit 107 by negotiation in protocol processing with a base station or a communication partner terminal.

Here, a system connected as a physical interface connected to the external interface unit 107, for example, a wired (wire) connection, a wireless (RF, I
r) The connection is not limited in the present embodiment. The same applies to the higher-order transfer methods (synchronous transfer method and asynchronous transfer method).

Next, the data flow in the portable telephone device of the present invention will be specifically described. In the case of communication using a voice bearer (voice call) RF processing section 101, baseband signal processing section 102, channel codec section 103, radio access control section 104
After the wireless channel is established, the C-plane layer 3 protocol processing is started for the outgoing / incoming call of the wireless access control unit 104. By this protocol processing, it is recognized that the bearer of the data channel is voice data. Thereby, the radio access control unit 104 notifies the channel codec unit 103 that the U plane data is to be output to the multimedia multiplexing / demultiplexing unit 105, and the data input to the multimedia multiplexing / demultiplexing unit 105 is Notifying the audio codec section 106 of the through output without performing the separation processing. In response to this notification, the multimedia multiplexing / demultiplexing unit 105 does not process the data input from the channel coder 103 and outputs the data to the audio codec 106 as it is, and also outputs the audio code input from the audio codec 106. The encoded data is output to channel codec section 103. With this series of sequences, a voice call by the mobile phone device of the present invention is realized.

In the case of data communication other than multimedia multiplexed data This communication sequence is applied to communication on a single medium using an unrestricted digital bearer, packet bearer, or the like. As described above, the RF processing unit 101 and the baseband signal processing unit 1
02, after a wireless channel is established by the channel codec unit 103 and the wireless access control unit 104, a layer 3 of the C plane is transmitted and received by the wireless access control unit 104.
Protocol processing is started. By this protocol processing, it is recognized that the bearer of the data channel is data other than the multimedia multiplexed data. Accordingly, the wireless access control unit 104 notifies that the U plane data is output to the wireless control unit, and the wireless access control unit 104 determines whether or not to perform the layer 2 processing according to the service. When the above processing is performed, the higher-order user data is output. When the processing is not performed, the input data itself is output to the external interface unit.

In the case of data communication of multimedia multiplexed data This communication sequence is performed by multimedia communication (voice, image, text file,
Control data). As described above, the RF processing unit 10
1. After a wireless channel is established by the baseband signal processing unit 102, the channel codec unit 103, and the wireless access control unit 104, layer 3 protocol processing of the C plane is started for transmission and reception of the wireless access control unit 104. By this protocol processing, it is recognized that the bearer of the data channel is multimedia multiplexed data. Thereby, the radio access control unit notifies the U-plane data to be output to the multimedia multiplexing / demultiplexing unit 105. The multimedia separating / multiplexing unit 105 performs a separating process on the input multimedia multiplexed data.

For each of the separated media, audio encoded data is output to an audio codec unit, and image data, text files, and control data are output to an external interface 107. The radio access control unit 104 performs layer 2
It is determined whether or not to perform the processing. If the processing is to be performed, the higher-order user data is transmitted. If the processing is not performed, the input data itself is transmitted to the external interface unit 1.
07.

When the encoded audio data stored in the external terminal is reproduced by the portable telephone device of the present invention, the encoded audio data is input to the external interface unit 107 from the external terminal. The wireless access control unit 104
An instruction is given to the external interface unit 107 and the multimedia demultiplexing unit 105 to make the audio codec unit 106 output audio data. At this time, as described above,
The multimedia demultiplexing unit 105 is not processed.
Thus, the audio data that has passed through the multimedia demultiplexing unit 105 is composited by the audio codec 106,
Output from the speaker. When audio data input from a microphone is input to an audio codec unit and encoded audio data is output to an external terminal, a microphone is connected to the audio codec unit 107, and audio data input from the microphone is output to the audio codec unit. Is encoded by The wireless access control unit 104 gives an instruction to the external interface unit 107 and the multimedia multiplex / demultiplex unit 105 to output the voice encoded data to the external interface. At this time, as described above, the multimedia demultiplexing unit 105 does not perform any processing. Thus, the audio data that has passed through the multimedia demultiplexing unit 105 is output from the external interface unit 107 to an external terminal.

[0026]

According to the portable telephone device of the present invention, the audio codec section only needs to be provided on the portable telephone device side, and it is not necessary to incorporate the audio codec into an external terminal having a videophone processing function and the like, and the cost can be reduced. I can do it. Further, since audio data can be input and output between the audio codec unit and the external interface, the present device can be used as a handset for audio communication of an external terminal.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a mobile phone device according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 mobile phone device 101 RF processing unit 102 baseband signal processing unit 103 channel codec unit 104 wireless access control unit 105 multimedia multiplexing / demultiplexing unit 106 audio codec unit 107 external interface unit

Claims (6)

[Claims] An RF processing unit that modulates and demodulates an RF signal; a baseband signal processing unit that performs baseband processing on a data signal input to and output from the RF processing unit in accordance with a wireless system; A channel codec unit that performs codec processing for each radio channel on a data signal input / output to / from the unit, and a multiplex / multiplex unit for multimedia data including audio data.
A multimedia demultiplexing unit that performs demultiplexing, an audio codec unit that performs codec processing on audio data input to and output from the multimedia demultiplexing unit or the audio input / output device, and an external terminal that processes multimedia data. An external interface unit for performing a protocol processing of a data signal, and a radio access control unit that controls input / output and processing of a data signal between the channel codec unit, the multimedia demultiplexing unit and the external interface unit, A mobile phone device comprising: 2. The wireless access control unit, wherein transmission of multimedia data on a wireless data transmission / reception channel is determined in advance by negotiation in protocol processing with a base station or a terminal of a communication partner. The portable talk device according to claim 1. 3. The wireless access control unit performs input / output of a data signal between the channel codec unit, the multimedia demultiplexing unit, and the external interface unit by negotiation in protocol processing with a base station or a communication partner terminal. 2. The mobile phone device according to claim 1, wherein: 4. The wireless access control unit according to claim 2, wherein in the case of voice communication only, the negotiation controls the multimedia multiplexing / demultiplexing unit not to process the voice data by the negotiation. Mobile phone device. 5. A loudspeaker is connected to the voice codec, and voice coded data input from the external terminal via an external interface is decoded by the voice codec and output to the speaker. The mobile phone device according to claim 4. 6. The mobile phone according to claim 4, wherein a microphone is connected to the audio codec unit, and audio encoded data input from the microphone and encoded by the audio codec unit is output to the external terminal. Telephone equipment.