JP3701070B2 - Voice recording / playback device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a voice recording / reproducing apparatus that converts a voice message into digital data and stores it in a semiconductor memory.
[0002]
[Prior art]
Conventionally, as a voice recording / reproducing apparatus that converts a voice message into digital data and stores it in a semiconductor memory, the telephone line is captured in response to an incoming signal coming from the telephone line, and the captured telephone line is It was used for a telephone with a voice message recording function such as an answering machine that sends a preset response message and then records a message message coming from the telephone line.
[0003]
However, in the answering machine using the semiconductor memory, the recording capacity of the voice message is relatively small as compared with that using the magnetic tape. Therefore, as shown in Japanese Patent Laid-Open No. 6-244990, the voice message is stored in the memory. While free storage in the free area, when the voice message to be stored is converted into a digital signal, if the free space of the memory is large, the bit rate of the digital signal is set large to store a high-quality voice message, In addition, when there is little free space in the memory, it is possible to store a large number of voice messages even if the free space in the memory is reduced by setting a small bit rate and storing voice messages with a small amount of data. As described above and as disclosed in Japanese Patent Laid-Open No. 5-236087, a voice message When a signal is generated, a high-quality voice message is stored by setting the bit rate of the digital signal high until a predetermined time elapses. By storing low-volume voice messages, it is possible to record high-quality voice messages during normal use, and to support occasional long-time voice messages. As shown in Japanese Laid-Open Patent Publication No. 2-305053, when the free space in the memory is decreasing, the voice message stored in the memory is read, converted into a voice code with a further increased compression rate, and rewritten in the memory. To increase the amount of free space in the memory so that voice messages can be recorded again. It had been.
[0004]
[Problems to be solved by the invention]
However, in order to effectively use the semiconductor memory as a voice message recording medium as in the above-described conventional apparatus, the bit rate for converting the voice message stored in the memory into a digital signal is set based on the free memory capacity. In some cases, it is not possible for the user to set whether the voice message is to be recorded with high sound quality or to be recorded with low sound quality to reduce the amount of data. Therefore, a very important voice message or a voice message with poor sound quality cannot be set. Has been recorded with low sound quality, making it difficult or impossible to hear voice messages.
[0005]
SUMMARY OF THE INVENTION An object of the present invention is to provide a voice recording / reproducing apparatus that can reliably listen to an arbitrary voice message such as an important message or a poor quality message stored in a semiconductor memory.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 Coming from a telephone line In a voice recording / reproducing apparatus that converts voice messages into digital data and stores them in a semiconductor memory, storage means for storing ID data in advance; Said Digital data It is determined whether or not ID data is included. Detection means for detecting ID data, ID data detected by the detection means, and ID data stored in the storage means; The Comparison And when it is determined that they match, The bit rate of digital data stored in semiconductor memory high Setting means for setting is provided.
[0007]
The invention according to claim 2 is stored in the storage means. ID Data and detected by the detection means ID The data is constituted by a DTMF signal.
[0008]
According to a third aspect of the present invention, the semiconductor memory includes a specific area for storing digital data converted at a high bit rate and a general area for storing digital data converted at a low bit rate. Memory control means for controlling the semiconductor memory and storing digital data converted at a high bit rate in a specific area and digital data converted at a low bit rate in a general area is provided.
[0009]
According to a fourth aspect of the present invention, the memory control means is configured such that when the amount of stored data in one of the specific area and the general area of the semiconductor memory reaches a predetermined amount, a part of the general area or the specific area is specified. Alternatively, the digital data converted at a high bit rate is stored in a general area, and the digital data converted at a low bit rate is stored in a specific area.
[0010]
According to a fifth aspect of the present invention, there is provided conversion means for reducing the digital data converted at a high bit rate, while the memory control means reads the digital data stored in a specific area of the semiconductor memory. The digital data is erased from the specific area, and the read digital data is stored in the general area of the semiconductor memory after the conversion means reduces the bit rate.
[0011]
Therefore, according to the first aspect of the present invention, the detecting means Judgment is made on whether digital data contains ID data. When the ID data is detected and the detected ID data matches the ID data stored in advance in the storage means, the setting means sets the bit rate of the digital data stored in the semiconductor memory high, while the detection means When the ID data is not detected, and when the ID data detected by the detection means and the ID data stored in the storage means do not match, the setting means sets the bit rate of the digital data stored in the semiconductor memory low. By doing so, it is possible to specify whether to perform high-quality sound recording or low-quality sound recording on the side where the voice message is recorded.
[0012]
According to the second aspect of the present invention, the DTMF signal coming from the telephone line or the like is detected by the detecting means, and is constituted by the detected DTMF signal. ID Data and pre-stored in storage means ID If the data matches, the setting means Stored in semiconductor memory While the bit rate of digital data is set high, it comes from the telephone line etc. by the detection means ID When data is not detected, and it comes from the telephone line detected by the detecting means ID Pre-stored in data and storage means ID If the data does not match, the setting means Stored in semiconductor memory By setting the bit rate of the digital data low, it is possible to specify whether the high-quality sound recording or the low-quality sound recording is performed on the side where the voice message is recorded.
[0013]
According to the invention of claim 3, the detection means Judgment is made on whether digital data contains ID data. When the ID data is detected and the detected ID data matches the ID data previously stored in the storage means, the setting means sets the bit rate of the digital data stored in the semiconductor memory to be high, and the memory control means Stores the digital data converted at the high bit rate in a specific area of the semiconductor memory, while the ID data is not detected by the detection means, and the ID data detected by the detection means and the ID stored in advance in the storage means When the data does not match, the setting means sets the bit rate of the digital data stored in the semiconductor memory to a low value, and the memory control means stores the digital data converted at the low bit rate in the general area of the semiconductor memory. By doing so, the recording side of the voice message is high. It is possible to specify whether performing low quality recording or perform quality recording, can be divided its storage area in the semiconductor memory.
[0014]
According to the fourth aspect of the present invention, when the data amount of the voice message stored in the specific area of the semiconductor memory reaches a predetermined amount, the memory control means determines a part of the general area of the semiconductor memory as the specific area. On the other hand, when the amount of voice message data stored in the general area of the semiconductor memory reaches a predetermined amount, the memory control means uses a part of the specific area of the semiconductor memory as the general area. In addition, the available capacity of the semiconductor memory can be used effectively and voice messages can be easily reproduced.
[0015]
According to the fifth aspect of the present invention, when the voice message stored in the specific area of the semiconductor memory is read by the memory control means, the voice message is erased from the specific area of the semiconductor memory, while the memory control means The conversion means lowers the bit rate of the voice message read from the specific area, and the memory control means stores the voice message with the lower bit rate in the general area of the semiconductor memory, so that a large amount of free space in the semiconductor memory. Can be obtained.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0017]
FIG. 1 is a schematic functional block diagram showing an electrical configuration of a voice recording / reproducing apparatus according to an embodiment of the present invention. FIG. 2 is a flowchart showing operation control during voice recording in the voice recording / reproducing apparatus. FIG. 5 is a flow chart showing operation control during voice reproduction in the voice recording / reproducing apparatus, and FIG.
[0018]
In FIG. 1, reference numeral 1 denotes an audio processor that performs input / output processing on received analog voice messages, 2 denotes an audio amplifier that amplifies analog voice messages input / output processed by the audio processor 1, and 3 denotes analog voice amplified by the audio amplifier 2. A speaker 4 for emitting a message to the outside is a recording / reproducing controller 4 that performs recording control of an analog voice message from the audio processor 1 and playback control of an analog voice message sent to the audio processor 1.
[0019]
Reference numeral 5 denotes a coder unit that converts an analog voice message sent by recording control by the recording / playback controller 2 into digital data at a high bit rate and serially outputs it, and converts the digital data converted by the coder unit into an analog voice message. Thus, this is a high bit rate audio codec composed of a decoder unit which sends it to the recording / playback controller 2.
[0020]
6 converts the analog voice message sent by the recording control by the recording / playback controller 2 into digital data at a low bit rate, or compresses the digital data converted by the coder section of the high bit rate voice codec 5 and outputs the serial data. A low bit rate audio codec including a coder unit that converts the digital data converted by the coder unit into an analog voice message and sends the analog voice message to the recording / playback controller 2.
[0021]
Reference numeral 7 denotes a specific data serial register 7a mainly storing digital data serially output by the coder unit of the high bit rate audio codec 5 and digital data serially output by the coder unit of the low bit rate audio codec 6 mainly. A write / read semiconductor memory such as an SRAM or a flash memory constituted by a general data serial register 7b to be stored, and the semiconductor memory is digital in the specific data serial register 7a or the general data serial register 7b. An address is assigned when data is stored.
[0022]
8 is an IDROM for registering and managing addresses generated and assigned by the semiconductor memory 7 and numerical data arbitrarily set by the user, and 9 is an address generated and assigned by the semiconductor memory 7 to the IDROM 8 and arbitrarily set by the user. A writing / reading unit 10 for writing numeric data or reading an address stored in the IDROM 8 is a recognition unit for comparing and recognizing the inputted numeric data and the numeric data stored in the IDROM 8.
[0023]
11 is a timer unit that measures the current date and time, and 12 is a digital data serially output by the coder unit 5a of the high bit rate audio codec 5 or a digital data serially output by the coder unit 6a of the low bit rate audio codec 6 , A display unit for displaying the usage state of the voice recording / playback apparatus and the recording state of the voice message, and the like. 14 is a voice message recording instruction, a voice message playback instruction, and a message selection instruction for playback. It is an operation unit.
[0024]
Reference numeral 15 denotes an operation instruction from the control unit (not shown), the address information of the IDROM 8 read by the writing / reading unit 9, the comparison and recognition result by the recognition unit 10, and the operation instruction from the operation unit 14 by the audio processor 1. Input / output control, recording / playback control by the recording / playback controller 2, data writing / reading control by the semiconductor memory 7, driving control of the high bit rate audio codec 5, driving control of the low bit rate audio codec 6, and by the buffer 12 The MPU performs temporary storage control, display control in the display unit 13, and the like.
[0025]
The audio processor 1, recording / playback controller 2, audio amplifier 3, speaker 4, high bit rate audio codec 5, low bit rate audio codec 6, semiconductor memory 7, IDROM 8, read / write unit 9, recognition unit 10 , The timer unit 11, the buffer 12, the display unit 13, and the MPU 15 constitute an audio recording / playback apparatus.
[0026]
In the audio recording / playback apparatus configured as described above, the user is instructed to register an ID used for distinguishing between a specific message and a general message by operating an operation unit (not shown), and numeric data is input. When done, the MPU 15 writes the input numeric data into the IDROM 8 by the writing / reading unit 9. At this time, character data may be input together with numeric data, and thus the initial setting of the voice recording / reproducing apparatus is performed.
[0027]
Next, the operation control when recording a voice message will be described for the voice recording / reproducing apparatus in which the initial setting as described above is performed.
[0028]
When the start of voice message recording is instructed by an operation instruction from a control unit (not shown) (step F1), the MPU 15 operates the audio processor 1, the recording / playback controller 2, and the high bit rate voice codec 5, and inputs from the outside. High-quality sound recording is started by causing the analog voice message to be input / output, recording control, and digital signal conversion processing at a high bit rate (step F2).
[0029]
In such an operating state, when an external analog voice message is input to the audio processor 1, input / output processing is performed in the audio processor 1, and then sent to the recording / playback controller 2. Sends an analog voice message input / output processed by the audio processor 1 to the high bit rate voice codec 5.
[0030]
The high bit rate audio codec 5 converts the analog voice message input via the recording / playback control 2 into digital data at a high bit rate such as 32 Kbps or 64 Kbps by the coder unit, and converts this digital data into serial data. The digital data is stored in the specific data serial register 7 a of the semiconductor memory 7 by sending the data to the specific data serial register 7 a of the semiconductor memory 7.
[0031]
On the other hand, the digital data converted by the coder section of the high bit rate audio codec 5 is also sent to the MPU 15, and the MPU 15 detects whether or not ID data is added to the end of the input digital data (step F3). When the MPU 15 determines that the latest digital data stored in the specific data serial register 7a is read out and sent to the low bit rate audio codec 6, The bit rate audio codec 6 is operated to further compress the digital data read from the specific data serial register 7a of the semiconductor memory 7 and convert it into a low bit rate digital signal such as 8 Kbps or 4 Kbps (step F4). ), Half after serial conversion To store general data for serial register 7b body memory 7.
[0032]
At this time, the MPU 15 assigns an address to the digital signal whose bit rate has been lowered by the low bit rate audio codec 6 and stores it in the general data serial register 7b of the semiconductor memory 7 (step F5) and writing. By controlling the reading unit 9, the assigned address is registered and managed in the IDROM 8 (step F6).
[0033]
When the MPU 15 registers an address in the IDROM 8, the MPU 15 stores it with a time stamp based on the time management of the timer unit 11 constituted by a real timer clock.
[0034]
On the other hand, if it is determined in the MPU 15 that ID data is appended to the end of the digital data converted by the coder unit of the high bit rate audio codec 5 (step F3), the ID data detected in the MPU 15 is recognized. While sending to the unit 10, the writing / reading unit 9 is controlled to cause the ID data stored in the IDROM 8 to be sent to the reading recognition unit 10, and the recognition unit 10 compares and recognizes whether the ID data match each other, If the MPU 15 determines that they do not match (step F7), the MPU 15 controls the semiconductor memory 7 to read out the latest digital data stored in the specific data serial register 7a to the low bit rate audio codec 6. At the same time, the low bit rate audio codec 6 is operated and the semiconductor memory is operated. The digital data read out from the specific data serial register 7a of R7 is further compressed and converted into a low bit rate digital signal such as 8 Kbps or 4 Kbps (step F4). After serial conversion, an address is given. Then, it is stored in the general data serial register 7b of the semiconductor memory 7 (step F5), and the write / read section 9 is controlled to register and manage the assigned address in the IDROM 8 (step F6).
[0035]
When the MPU 15 registers an address in the IDROM 8, the MPU 15 stores it with a time stamp based on the time management of the timer unit 11 constituted by a real timer clock.
[0036]
Further, it is determined that ID data is added to the end of the digital data converted by the coder unit of the high bit rate audio codec 5 in the MPU 15 (step F3), and the detected ID data is stored in the IDROM 8. If it is determined that the data matches the ID data (step F7), the MPU 15 gives an address to the digital data converted by the coder unit of the high bit rate audio codec 6 and the serial data for specific data in the semiconductor memory 7 is obtained. The store to the register 7a is performed (step F8), and by controlling the writing / reading unit 9, the assigned address is registered and managed in the IDROM 8 (step F9).
[0037]
When the MPU 15 registers an address in the IDROM 8, the MPU 15 stores it with a time stamp based on the time management of the timer unit 11 constituted by a real timer clock.
[0038]
Therefore, according to the above operation control, it is possible to select high-quality sound recording or low-quality sound recording by giving ID data to the voice message, so that the message that seems to be important on the voice message recording side. Or, when there is a lot of noise, a message can be recorded with high sound quality, and as a method of giving ID data, for example, when the recording / playback apparatus configured as described above is used for an answering machine, What is necessary is just to give by operating the operation button of the other party's telephone which is sending the message, and the MPU 15 should just recognize ID data based on the DTMF signal input through a telephone line at that time.
[0039]
Note that the specific data serial register 7a and the general data serial register 7b constituting the semiconductor memory 7 perform address management of all the memory areas in advance in the MPU 15, so that the remaining memory area is checked in real time. Therefore, when a new specific message is received when the memory of the specific data serial register 7a is full, the specific data digitized by the high bit rate audio codec 5 is transferred to the general data serial register 7b according to the instruction of the MPU 15. On the contrary, when the memory of the general data serial register 7b is general and a new specific message is received, the data digitized by the low bit rate audio codec 6 according to the instruction of the MPU 15 is stored in the specific data serial register 5 Is .
[0040]
Therefore, according to the operation control, the free space of the semiconductor memory 7 can be used effectively.
[0041]
In addition, the MPU 15 manages the time by the timer unit 11 constituted by the real timer clock and stores the received message with a time stamp. When a new message is received when both the memory 7a and the general data serial register 7b are full, the oldest received data in the specific data serial register 5 or the general data serial register 6 is overwritten and the old data is erased. Is done.
[0042]
At this time, when the user registers a message in advance and selects and executes general message update, the oldest data in the general data serial register 7b is erased and updated with new data, and when specific message update is selected and executed, The oldest data in the data serial register 7a is erased and updated.
[0043]
That is, for example, when the general message update is selected and executed, and the memory of the specific data serial register 7a and the memory of the general data serial register 7b are both full, when the MPU 15 receives a new general message, the MPU 15 The input / output processing is instructed to the processor 1 and the recording / reproduction controller 2 is instructed to record, and the voice message input via the recording / reproduction controller 2 is digitized by the coder unit of the high bit rate audio codec 5.
[0044]
Then, the MPU 15 temporarily stores the data digitized by the coder unit of the high bit rate audio codec 5 in the buffer 12, then reads the data temporarily stored in the buffer 12, and reads the low bit rate audio codec 6. Is further converted into a digital signal with a reduced bit rate of 8 Kbps or 4 Kbps, and stored again in the buffer 12, thereby reducing the amount of data stored in the buffer 12 and reducing the amount of data stored in the general data serial register 7b. When the data amount of old data and the data amount of data temporarily stored in the buffer 12 are checked and the data amount of data temporarily stored in the buffer 12 is secured, the data amount of the oldest data is insufficient. Sequentially overwrites the buffer with old data To update the data.
[0045]
When the general message update is selected and executed, and both the specific data serial register 7a and the general data serial register 7b are full, when a new specific message is received, the voice message is sent in response to an instruction from the MPU 15. Do not accept recordings.
[0046]
When the specific message update is selected and executed, and the memory of the specific data serial register 7a and the memory of the general data serial register 7b are both full, the MPU 15 inputs and outputs to the audio processor 1 when a new specific message is received. In addition to instructing the processing, the recording / playback controller 2 is instructed to record, and the voice message input via the recording / playback controller 2 is digitized by the coder unit of the high bit rate speech codec 5.
[0047]
Then, the MPU 15 temporarily stores the data digitized by the coder unit of the high bit rate audio codec 5 in the buffer 12 and temporarily stores the data amount of the oldest data in the specific data serial register 7 a and the buffer 12. In order to check the amount of data stored and to secure the amount of data temporarily stored in the buffer 12, if the data amount of the oldest data is insufficient, the old data is overwritten on the buffer sequentially. Update.
[0048]
When the specific message update is selected and executed, and when both the specific data serial register 7a and the general data serial register 7b are full, when a new general message is received, the voice message is sent in response to an instruction from the MPU 15. Do not accept recordings.
[0049]
Therefore, according to the operation control described above, the latest voice message can be recorded while the voice message desired by the user is held.
[0050]
Next, operation control when reproducing a voice message recorded by the operation control will be described.
[0051]
When a voice message is recorded in the specific data serial register 7a or the general data serial register 7b of the semiconductor memory 7, the total number is obtained by the MPU 15 and displayed on the display unit 13 as shown in FIGS. 5 (a) and 5 (b). Alternatively, an image as shown in FIG. 5C is displayed.
[0052]
5A is displayed when a new message is received when both the specific data serial register 7a and the general data serial register 7b of the semiconductor memory 7 are full. This message is displayed when recording is set not to be recorded, and FIG. 5B shows a new general message when the specific data serial register 7a and the general data serial register 7b of the semiconductor memory 7 are full. Is displayed when it is set to be erased from the oldest data in the general data serial register 7b and updated to new data, and FIG. When both the data serial register 7a and the general data serial register 7b are full When receiving Oite new specific message, it is intended to be displayed when the set to be updated to the new data is erased from the oldest data in the specific data for the serial register 7a.
[0053]
In such a display state, when the user operates the operation unit 14 to instruct the reproduction of the voice message (step F11), the MPU 15 controls the display unit 13 to reproduce the reproduction mode as shown in FIG. When the user operates the operation unit 14 to request the reproduction of the general message based on this display (step F13), the MPU 15 writes / reads the read / write unit 9 And the first address in the general message is searched from the IDROM 8 (step F14), and the same address as that address is selected from the semiconductor memory 7 (step F15).
[0054]
Then, the MPU 15 reads the time stamp stored together with the first address retrieved from the IDROM 8, and displays information such as the date and time when the voice message was recorded as shown in FIG. 5E (step F16). ).
[0055]
In such a display state, when the user operates the operation unit 14 to instruct to move to the next or previous case (step F17), the MPU 15 performs the next operation by the same operation control as described above. Alternatively, the previous address search / selection and information display are performed (steps F14 to F16).
[0056]
When the user operates the operation unit 14 to instruct the reproduction of the voice message in the state where the first or nth information is displayed (step F18), the MPU 15 causes the semiconductor memory 7 to The data from the address selected in the above is read out and sent to the low bit rate audio codec 6 (step F19), and the low bit rate audio codec 5, the recording / playback controller 2 and the audio processor 1 are operated to perform analog signal conversion processing, Low sound quality reproduction is started by performing reproduction control and input / output processing (step F20).
[0057]
In such an operating state, when digital data is read from the general data serial register 7b of the semiconductor memory 7, the digital data is converted into an analog voice message by the decoding unit of the low bit rate voice codec 6, Thereafter, the signal is supplied to the audio amplifier 3 via the recording / playback controller 2 and the audio processor 1, amplified there, and then emitted to the outside by the speaker 4.
[0058]
On the other hand, in a state where an image requesting the designation of the reproduction mode as shown in FIG. 5D is displayed on the display unit 13 (step F12), the user operates the operation unit 14 to reproduce the specific message. When requested (step F13), the MPU 15 controls the writing / reading unit 9 to retrieve the first address in the specific message from the IDROM 8 (step F21) and selects the same address from the semiconductor memory 7 as well. (Step F22).
[0059]
Then, the MPU 15 reads the time stamp stored together with the first address searched from the IDROM 8, and as shown in FIG. 5G, information such as the date and time when the voice message was recorded and the name of the recording person are recorded. It is displayed (step F23).
[0060]
In such a display state, when the user operates the operation unit 14 to instruct the transition to the next or previous case (step F24), the MPU 15 performs the next operation by the same operation control as described above. Alternatively, the previous address search / selection and information display are performed (steps F21 to F23).
[0061]
When the user operates the operation unit 14 to instruct the reproduction of the voice message in the state where the first or nth information is displayed (step F25), the MPU 15 causes the semiconductor memory 7 to The data from the address selected in the above is read out and sent to the high bit rate audio codec 5 (step F26), and the high bit rate audio codec 5, the recording / playback controller 2 and the audio processor 1 are operated to perform analog signal conversion processing, High sound quality reproduction is started by performing reproduction control and input / output processing (step F27).
[0062]
In such an operating state, when digital data is read from the specific data serial register 7a of the semiconductor memory 7, the digital data is converted into an analog voice message by the decoding unit of the high bit rate voice codec 5, Thereafter, the signal is supplied to the audio amplifier 3 via the recording / playback controller 2 and the audio processor 1, amplified there, and then emitted to the outside by the speaker 4.
[0063]
When reading of the digital data from the specific data serial register 7a of the semiconductor memory 7 is completed (step F28), the MPU 15 controls the display unit 13 to leave the reproduced voice message as a high-quality sound recording, Alternatively, the user is requested to record as a low sound quality recording (step F29), and in response to this, the user operates the operation unit 14 to instruct the holding of the high sound quality recording (step F30), and the MPU 15 performs a reproduction operation. Is stopped or the next data is played back.
[0064]
On the other hand, when the user operates the operation unit 14 in response to the display on the display unit 13 and instructs the holding of the low-quality sound recording (step F31), the MPU 15 uses the data corresponding to the designated address of the IDROM 8 for the specific data. The data is read from the serial register 7b and sent to the low bit rate audio codec 6 (step F35), and the low bit rate audio codec 6 is operated to update the digital data read from the specific data serial register 7a of the semiconductor memory 7. Is converted into a low bit rate digital signal such as 8 Kbps or 4 Kbps (step F32), serially converted, and stored in the general data serial register 7b of the semiconductor memory 7.
[0065]
At this time, the MPU 15 assigns an address to the digital signal whose bit rate has been lowered by the low bit rate audio codec 6 and stores it in the general data serial register 7b of the semiconductor memory 7 (step F33) and writing / By controlling the reading unit 9, the assigned address is registered in the IDROM 8 (step F34), and the address corresponding to the specific data registered in the IDROM 8 is deleted and managed (step F35).
[0066]
Therefore, according to the above operation control, it is possible to reproduce the voice message recorded with high sound quality and the voice message recorded with low sound quality in the order of recording, and when the voice message recorded with high sound quality is reproduced, the reproduced voice message is reproduced. Since the message can be changed to low-quality sound recording, the free capacity of the semiconductor memory 7 can be effectively increased.
[0067]
In the above embodiment, when reproducing the voice message stored in the semiconductor memory 7, the reproduction mode is divided into specific and general. However, the reproduction mode is not limited to this. For example, the specific message and the general message are The MPU 15 may be played back in the order in which it was recorded. At this time, the MPU 15 needs to determine whether the voice message to be played back is a specific message or a general message based on the searched address. The voice message stored in the semiconductor memory 7 may be arbitrarily deleted by the operation of the operation unit 14 by the user.
[0068]
In the present embodiment, only numeric data constituted by DTMF signals coming from the telephone line based on operation of numeric keys on the calling side as input data has been described. However, the present invention is not limited to this. Numeral data based on the operation of numeric keys on the called side, or the other party's telephone number data constituted by the DTMF signal coming from the telephone line at the time of the incoming call may be used. When recording a general message, the recording / playback controller 2 does not perform further audio compression on the high bit rate digital data obtained by converting the general message by the high bit rate audio codec 5 but by the low bit rate audio codec 6. Processed by the audio processor 1 It may be caused to store the voice message directly to a low bit rate by the audio codec 6 into digital data of a low bit rate general data for the serial register 7b.
[0069]
【The invention's effect】
As described above, according to the invention according to any one of claims 1 to 3, it is possible to specify whether to perform high sound quality recording or low sound quality recording on the voice message recording side. Specifying high-quality recording when recording a message in a low-quality situation or a low-quality sound, so that the listener does not miss important messages and can not hear a message recorded in a low-quality sound situation Can be heard reliably.
[0070]
According to the fourth aspect of the present invention, when the data amount of one of the specific area and the general area of the semiconductor memory becomes full, a part of the area of the other general area or the specific area is changed to the specific area or the general area. As a result, it is possible to effectively use the free space of the semiconductor memory, so that a large number of voice messages can be recorded in the semiconductor memory.
[0071]
According to the fifth aspect of the present invention, when a voice message recorded with high sound quality in a specific area of the semiconductor memory is reproduced, the voice message is erased from the specific area of the semiconductor memory, and the reproduced voice message is stored in the semiconductor memory. By re-recording the low-quality sound in the general area, a lot of free space can be obtained in the semiconductor memory, so that a large number of voice messages can be recorded in the semiconductor memory.
[Brief description of the drawings]
FIG. 1 is a schematic functional block diagram showing an electrical configuration of a voice recording / reproducing apparatus according to an embodiment of the present invention.
FIG. 2 is a flowchart showing operation control at the time of voice message recording in the voice recording / reproducing apparatus.
FIG. 3 is a flowchart showing operation control during voice message playback in the voice recording / playback apparatus.
FIG. 4 is a flowchart showing operation control during voice message playback in the voice recording / playback apparatus.
FIG. 5 is an explanatory diagram showing an example of image display during voice message playback in the voice recording / playback apparatus.
[Explanation of symbols]
1 Audio processor
2 Recording / playback controller
3 Audio amplifier
4 Speaker
5 High bit rate audio codec
6 Low bit rate audio codec
7 Semiconductor memory
8 IDROM
9 Write / read unit
10 Recognition part
11 Timer section
12 buffers
13 Display section
14 Operation unit
15 MPU

Claims (5)

In a voice recording / playback apparatus that converts voice messages coming from a telephone line into digital data and stores them in a semiconductor memory,
Storage means for storing ID data in advance;
When the digital data to determine whether it contains the ID data includes, detecting means for detecting said ID data,
Wherein comparing the ID data stored in the detected ID data and said storage means by the detecting means, when it is determined that the matching, and setting means for setting a higher bit rate of the digital data stored in the semiconductor memory A voice recording / reproducing apparatus characterized by being provided. 2. The voice recording / reproducing apparatus according to claim 1, wherein the ID data stored in the storage means and the ID data detected by the detection means are constituted by a DTMF signal. The semiconductor memory is composed of a specific area for storing digital data converted at a high bit rate and a general area for storing digital data converted at a low bit rate,
2. A memory control means for controlling the semiconductor memory and storing digital data converted at a high bit rate in a specific area and storing digital data converted at a low bit rate in a general area. Or the audio | voice recording / reproducing apparatus of Claim 2. The memory control means uses the general area or a part of the specific area as the area of the specific area or the general area when the storage data amount of either the specific area or the general area of the semiconductor memory reaches a predetermined amount, 4. The audio recording / reproducing apparatus according to claim 3, wherein digital data converted at a high bit rate is stored in a general area, and digital data converted at a low bit rate is stored in a specific area. While providing conversion means for reducing the bit rate of digital data converted at a high bit rate,
When the memory control unit reads the digital data stored in the specific area of the semiconductor memory, the memory control unit erases the digital data from the specific area and lowers the bit rate of the read digital data by the conversion unit. 5. The voice recording / reproducing apparatus according to claim 3, wherein the voice recording / reproducing apparatus is stored in a general area of the semiconductor memory.

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