GB2321823A

GB2321823A - Radio telephone

Info

Publication number: GB2321823A
Application number: GB9702205A
Authority: GB
Inventors: Sack Chan; Robert Ruan
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-02-04
Filing date: 1997-02-04
Publication date: 1998-08-05
Anticipated expiration: 2017-02-04
Also published as: GB2321823B; FR2759522B3; GB9702205D0; DE19704992A1; FR2759522A3

Abstract

An audio sending device for portable radio telephone comprises a central processing unit, a digital signal processer, a read only memory, a random access memory, a hand free telephone receiver circuit, a microphone amplifier, an audio frequency amplifier, an electric power source, and a portable radio interface circuit. It is the main function of said device converting the user's audio signals to digital data and storing in the memory to use as instructions to said phone. When the user intends to make a call, he may speak out pre-stored single words,said device is able to search the corresponding data stored in the memory and after comparing, the corresponding data are taken out for instructing the device to send. Accordingly, possible car accident due to lack of care to the traffic condition might be avoided.

Description

1 3 2321823 AUDIO SENDING DEVICE FOR PORTABLE RADIO TELEPHONE The present

invention relates to an audio sending device which is applicable to a portable radio telephone on the car, in case of making telephone call, the user may dial the telephone with voice instead of finger. It will protect the user from a possible traffic accident when he makes telephone call with a walky-talky in the car he is driving by himself At present, there are many car drivers who carry portable radio telephones with them convenient for making a phone call at any time from the car. However, it is very dangerous for the user to push numeric buttons on the telephone with finger of one hand and hold the telephone body with the other hand and leave the steering wheel of the car uncontrolled. Especially if the need for emergency braking occurs coincidentally at the moment he is dialing the phone, not only the portable radio telephone might drop and break, in worse case it will cause a serious car accident.

In order to let the user make phone call safely while he is driving a car without entailing any traffic accident, through a long time study and trial, the applicant has developed a radio telephone audio sending device of the present invention which comprises a central processing unit (CPU), a digital signal processer (DSP), a read only memory(ROM), a random access memory (RAM), a hand free receiver circuit, a 2 5 microphone amplifier, and audio amplifier, an electric power source and a portable radio telephone interface circuit.

It is the main fimction of the audio sending device for portable radio telephone according to the present invention to convert the users audio signal to digital data and to store them in the memory for using as and instruction for controlling the portable radio telephone. When the user intends to use said telephone. Only he has to do is to speak out pro-stored single words, the device will automatically find out required data to control 2 sending.

Almost all of portable radio telephones have memory sending function, the device of the present invention is able to find out corresponding sending number from the memory and execute according to the user audio instruction.

The execution procedure is as follows:

Wherein X represents the code for sending number in the memory. Accordingly, the sending procedure of CPU and other hard ware circuits are simplified. In case that the 1-3 amount of sending number data sets are too less and not sufficient for use, the device of the present invention can memorized the necessary numbers and store them in RAM increasing the memorized number data sets for the device. Ilierefore, the CPU must directly instruct the telephone to execute sending according to sending number in the memory as shown in the following flow chart:

X - X - X Wherein X represents the telephone number At first, the ROM and the RAM of the device according to the present invention are so arranged as to be divided in a number of memory blocks, and offered different addresses respectively. Ile ROM is used to store audio instruction data for system operation, while the RAM is used to store different audio instructions for users sending. In case the amount of sets of memorized sending number for a portable telephone is too small and not sufficient, the RAM can then store numbers additionally. The data in the ROM are pre-programmed and stored in the factory and to be delivered only at the specified time to inform the user what action shall be taken at that time; while the RAM 3 is blank when delivered from the factory and has to be stored data according to the users own program.

All these data are stored in digital form, if the device of the present invention intends to store or read such data, it is to go through the procedure of locating address by CPU, and that of digital to analog conversion and procession by DSP. The first memory block in the RAM is offered a relatively special function for storing the user's sending instruction. When the system identifies that the user's voice is corresponding to the data stored in this block, it judges that sending action shall be executed, and the result is equivalent to pushing down the push button " SEND"on the portable telephone. Thus the users first audio instruction is "SENV in English at the beginning of storing the audio instruction.

Since different portable radio telephone manufacturers provide their own formats for the interface control signal, both the soft ware in the CPU and the interface circuit are not compatible among portable radio telephones of different manufacturers and shall be replaced in case the user changes his portable radio telephone.

IN THE DRAWINGS The invention, as well as its many advantages, may be further understood by the following detailed description and drawings in which:

Fig. 1 is the block diagram showing layout of the audio sending device for portable radio telephone according to the present invention; Fig. 2 is a flow chart for the simulation mode of the audio sending device for portable radio telephone according to the present invention; Fig. 3 is a flow chart for the sending mode of the audio sending device for portable radio telephone according to the present invention; and Fig. 4 is a flow chart for a general operation mode of the audio sending device for 4 portable redio telephone according to the present invention.

Referring to the block diagram in Fig. 1 of the present invention in which comprises a central processing unit (CPU) 1, a digital signal processer (DSP) 2, a read only memory (ROM) 3, a random access memory (RAM) 4, a hand free telephone receiver circuit 5,a microphone amplifier 6, an audio frequency amplifier 7, an electric power source 8, and a portable radio telephone interface circuit 9, the detailed description for each component is: 1. Central Processing unit (CPU) l

CPU is basically a microprocesser for control of operation procedure and sending function for the portable radio telephone of the present invention.

1 D- 2. Digital Signal Processser (DSP) 2 DSP 2 according to the present invention can process analog signal rapidly and operate together with the digital signal interface to analyze the characteristic of voice from its tune and speed, also it is responsible for, in the present invention, the conversion of audio signal to digital signal, and compare the user's audio instruction to the prestored data and find out the difference between them. The reliability and accuracy of its judgment is so high that makes said DSP 2 rank to one of the most important component unit of the present invention.

2,) 3. Read Only Memory (ROM) 3 ROM 3 unit is for storing the system audio data provided for CPU 1 to call at the specified time. By reading and converting said data to voice, DSP 2 informs the user of the next procedure.

3 0 4. Random Access Memory (RAM) 4 RAM 4 unit is for storing the user's audio instruction data. The users voice for sending is compared by the system with the stored instruction data, and the first data set is the stored instruction for calling the portable radio telephone to send.

5. Hand Free Telephone Receiver Circuit 5 When the telephone is in use, the amplified audio signal reaching the speaker may be fed back to the microphone. The hand free telephone receiver circuit 5 is able to prevent such a feed back phenomenon that the audio signal to the speaker is gathered again by the microphone, and instead of it,said hand free telephone receiver circuit 5 can let the user's voice output directly from the speaker after amplification. In addition, it is not necessary for the user to hold the telephone with one hand when he is calling in the 1 15) moving car which he is driving, the security of driving may be greatly assured. Said hand free telephone receiver circuit 5 plays and unique role in the device of the present invention, it is basically independent of the operation of the entire device, nor the sending of audio signal needs its help. But it helps the user to achieve the purpose of making the phone call in the car without touching the telephone.

6. Nficrophone Amplifier 6 Nficrophone amplifier is able to amplify the voice gathered by the microphone, and after amplification, supply it to other circuits for fiu- ther treatment, T'he user may use said device of the present invention from a location slightly distant from the microphone 25) without worrying about the intensity of the voice may reduce.

7. Audio frequency amplifier 7 The audio frequency amplifier is able to amplify the audio signal input to the level sufficient to actuate the speaker.

6 0 8. Electric Power Source 8 The electric power source 8 is able to stabilize the unstable power incoming from outside or from the car and supply the stabilized power to each unit of said device.

9. Portable Radio Telephone Interface Circuit 9 The device of the present invention may be made compatible to any kinds of portable radio telephones by changing the portable radio telephone interface circuit 9.

Me operation modes of the device of the present invention is classified in three categories, namely, a simulation mode, a sending mode, and an operation mode, the detailed description is as follows:

Referring to Fig. 2, it shows a flow chart for the simulation mode of the device according to the present invention. Before using the device, the user shall first of all, define all the audio sending instructions for said device, in other words, to teach said device to identify the audio instruction made by the user and to be able to send corresponding set of numbers as shown in the simulation mode. During simulation, following the operation procedure, the CPU will continuously renew the telephone number on the video display unit of the portable radio telephone and remind the user with system language step by step so that the user may accomplish inputting his audio data very smoothly through watching the display unit of said telephone.

Referring to Fig. 3, it show a flow chart for the sending mode according to the present invention. After input operation is finished, the user may still inquire about the data content one by one by following the sending mode. Only by pushing forward sending or backward sending button, the CPU may call the DSP unit to send audio instruction of said telephone number set for the user to check whether the data are true or not as shown in the sending mood process. If the user discover there is an audio instructions which shall be renewed during the procedure he is inquiring about the data 7 3 one by one, only he has to do is to push the button of simulation to start the simulation mode for renewing said audio instruction.

Referring to Fig. 4, it shows a flow chart for a general operation mode for the device according to the present invention. After accomplishing the simulation, the user usually goes to the general operation mode in which a push button is provided by the present invention positioned at the place very convenient for the user to control while he is driving the car. As soon as the button has been pushed, he is informed with system language that the device is ready for work. After receiving the user's audio instruction from the microphone, the DSP will search and check data in the RAM unit one by one for similar voice. If it is identified to be identical to the first data set, the CPU instructs said device to send. If it is identical to another data set other than the first one, the CPU calls the telephone to display that number in memory on the video display unit and amplify it in the form of voice for user to confirm If the data unit taken out is in correct, the user may speak again, and the system will search again and repeat, the above described procedure until the real one is found.

15) 2 'D 8

Claims

3 CLAIMES:

1. An audio sending device for portable radio telephone mainly comprises: a central processing unit basically a microprocesser for control of system operation procedure and sending flinction of a portable radio telephone; a digital signal processer for processing analog signal rapidly and operation together with the digital signal interface for analyzing the characteristic of voice from its tune and speed, also responsible for the conversion of audio signal to digital signal, and able to compare the user's audio instruction to the pre-stored data and find out the difiFerence between them with high reliability and accuracy; a read only memory unit for storing the system audio data provided for the central processing unit to call at the specified time, and for digital signal processer to read and convert said data to voice, and then to inform the user of the next procedure; a random access memory unit for storing the users audio instruction data, the user voice for sending being compared by the system with the stored instruction data and if the first data set being identical to stored instruction, calling the portable radio telephone to send; a hand free telephone receiver circuit able to directly amplify the user's voice and to output it from the speaker, the user being not necessary to hold the telephone with one hand when using it in the car driven by him thus greatly assuring the security.

a microphone amplifier able to amplify the voice gathered by the microphone and then supplying it to other circuits for further treatment, and also able to let user use said device from a location slightly distant from the microphone without alfecting the intensity of the voice gathered; an audio frequency amplifier able to amplify the audio signal input to the level suflicient to actuate the speaker; an electric power source able to stabilize the unstable power incoming form outside or from the car and supplying the stabilized power to each unit of said device; and 9 a portable radio telephone interface circuit, by changing it, said device being able to be compatible to any kinds of portable radio telephones; by using the voice to control the sending of a portable radio telephone in the car with said device, possible car accident due to lack of care to the traffic condition n-dght be 5 avoided.

2. An audio sending device for portable radio telephone substantially as hereinbefore described with reference to and as shown in the accompanying drawings.

3. An audio sending device for a portable radio telephone, the device comprising a central processing unit, a digital signal processer, a read only memory unit, a random access memory unit, a hands-free telephone receiver circuit, a microphone amplifier, an audio frequency amplifier, an electric power source, and a portable radio interface circuit.