JP3231722B2 - Call recording system, call recording method, and recording medium - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a call recording system and a call recording method, and more particularly to a call recording system and a call recording method for recording a call in an Internet telephone system, and a recording medium.

[0002]

2. Description of the Related Art In recent years, the Internet has rapidly spread. Conventionally, the Internet has been used for transmitting character information and image information. However, recently, a so-called Internet telephone that transmits voice information almost in real time using the Internet has attracted attention.
Internet telephony allows low-cost calls to overseas parties.

[0003]

However, there is a problem that the existing Internet telephone system does not have a function of recording a call.

[0004] The present invention has been made in view of such a situation, and it is an object of the present invention to enable a telephone call to be recorded in an Internet telephone system.

[0005]

According to the first aspect of the present invention, there is provided a call recording system for recording a call on an Internet telephone system for transmitting voice packets via the Internet. First receiving means for receiving a compressed first voice packet signal transmitted from a network, and second receiving means for receiving a compressed second voice packet transmitted from a second network And decompresses the first audio packet signal to generate first audio data,
Expansion means for expanding the audio packet of the first and second audio data, synthesizing means for synthesizing the first audio data and the second audio data to generate synthetic audio data, and synthesizing means for generating the synthesized audio data Storage means for storing the synthesized voice data. Also, the first voice packet received by the first receiving means is stored in the first storage area, and the second voice packet received by the second receiving means is temporarily stored in the second storage area. Temporary storage means for storing may be further provided. Also,
The first voice packet signal transmitted from the first network is a voice packet signal transmitted from the PSTN, and the second voice packet transmitted from the second network is transmitted from the Internet. Incoming voice packets. Also,
Compression means for compressing the synthesized voice data may be further provided, and the storage means may store the compressed synthesized voice data. A call recording method according to claim 5, wherein at least a call recording method for recording a call on an Internet telephone system for transmitting a voice packet via the Internet, wherein the compressed call transmitted from the first network is recorded. A first receiving step of receiving a first voice packet signal; a second receiving step of receiving a compressed second voice packet transmitted from a second network; A packetizing step of decompressing and packetizing to generate first voice data; a decompressing step of decompressing a second voice packet to generate second voice data; and converting the first voice data and the second voice data. A synthesizing step of synthesizing and generating synthesized voice data; and a storing step of storing the synthesized voice data generated in the synthesizing step. And wherein the Rukoto. A recording medium according to a sixth aspect is characterized in that a program capable of executing the call recording method according to the fifth aspect is recorded. In a call recording system, a call recording method, and a recording medium according to the present invention, a compressed first voice packet signal transmitted from a first network is received, and a compressed voice packet signal transmitted from a second network is received. Receiving the generated second voice packet, decompressing the first voice packet signal, generating first voice data, decompressing the second voice packet, generating second voice data, The first voice data and the second voice data are synthesized to generate synthesized voice data, and the generated synthesized voice data is stored.

[0006]

FIG. 1 is a block diagram showing a configuration example of an embodiment of an Internet telephone system to which a call recording system of the present invention is applied. As shown in FIG. 1, in the present embodiment, an Internet telephone device 2 having a function as an Internet telephone for making a telephone call via a network 1 such as the Internet, and a telephone having a function of recording a telephone call by the Internet telephone device 2 are provided. And a recording device 3.

The Internet telephone device 2 includes a packet input / output device 21 for controlling the input and output of voice packets to and from the network 1 such as the Internet, a central processing unit 22 for controlling each unit, and a line card 24 described later. A signal processing device 23 that performs predetermined signal processing on the voice packet input through the PSTN network (pub)
like switched telephone ne
A network card 24 for inputting voice packets transmitted from a network (public switched telephone network) 4.

[0008] The call recording device 3 is a temporary storage for temporarily storing voice packets from the network 1 and voice packets from the PSTN network 4 supplied from the central processing unit 22 constituting the Internet telephone device 2 separately. The device 31 and the voice packet from the network and the voice packet from the PSTN network 4 stored in the temporary storage device 31 are decompressed, and the voice packet from the network 1 and the voice packet from the PSTN network 4 are synthesized. It comprises an arithmetic unit 32 for generating audio data, and a storage unit 33 for storing the synthesized audio data generated by the arithmetic unit 32.

In this Internet telephone system,
The voice packet may be input from the network 1 to the central processing unit 22 via the packet input / output device 21, or may be input from the PSTN network 4 via the line card 24 and the signal processing device 23. Therefore, voice packets come in from two directions, from the packet input / output device 21 and the signal processing device 23.

The central processing unit 22 supplies these voice packets to a temporary storage device 31 and stores them in each direction. The voice packet from the network 1 in each direction stored in the temporary storage device 31 is
Since each voice is compressed, the arithmetic unit 32 expands the compressed voice packet and stores it in the storage device 33 as a voice signal. afterwards,
An audio signal input from both directions, that is, an audio signal input from the packet input / output device 21 and a signal processing device 23
Performs voice synthesis on the voice signal input from the PCM, for example, PCM (pulse code modulation).
on) The data is stored in the storage device 33 as encoded audio data.

Next, the operation of the embodiment shown in FIG. 1 will be described in detail with reference to the flowcharts of FIGS. First, in step S1, it is determined whether or not the call recording device 3 has received a call recording start signal. When it is determined that the call recording start signal has not been received by the call recording device 3, the process of step S1 is repeatedly executed. On the other hand, when it is determined that the call recording start signal is received by the call recording device 3, the call recording device 3 is activated, and the process proceeds to step S2.

Here, the start of the call recording is performed, for example, by operating the operation button (not shown) for instructing the start of the call recording provided on the call recording device 3 by the user. Shall be notified. Also,
The start of the call recording is also notified to the central processing unit 22 of the Internet telephone device 2.

The central processing unit 22 which has received this notification, as described later, transmits the voice packet input from the packet input / output unit 21 to the central processing unit 22 and the signal processing unit 23.
The voice packets entering the central processing unit 22 are divided and supplied to the temporary storage device 31 of the call recording device 3 to be stored separately and sequentially. Here, the direction in which the voice packet flows from the packet input / output device 21 to the central processing unit 22 is referred to as “downward direction”, and the direction in which the voice packet flows from the signal processing device 23 to the central processing unit 22 is referred to as “upward direction”. I will.

That is, in step S2, the central processing unit 22 determines whether or not an upstream voice packet has been received. As a result, when it is determined that the upstream voice packet has been received, the process proceeds to step S3, where the received upstream voice packet is supplied to the temporary storage device 31, and the predetermined upstream voice packet for storing the upstream voice packet is stored. It is stored in a storage area. Thereafter, the process proceeds to step S4.

On the other hand, if it is determined in step S2 that no uplink voice packet has been received, the process proceeds to step S4.

In step S4, it is determined whether or not a downstream voice packet has been received. If it is determined that the downstream voice packet has been received, the process proceeds to step S5, in which the received downstream voice packet is supplied to the temporary storage device 31, and a predetermined storage for storing the downstream voice packet is performed. Store in the area. Thereafter, the process proceeds to step S6.

In step S6, the central processing unit 2
By 2, it is determined whether or not a signal instructing the end of the call recording (call recording end signal) has been received. The call recording end signal is transmitted by the user, for example, to the call recording device 3.
When the operation button (not shown) for instructing the end of the call recording provided in is operated and the end of the call recording is instructed, it is supplied to the central processing unit 22 and the call recording device 3.

If it is determined in step S6 that the call recording end signal has not been received by the central processing unit 22, the process returns to step S2 and returns to step S2.
Subsequent processing is repeatedly executed. On the other hand, if it is determined that the call recording end signal has been received, the process proceeds to step S7. In this way, the above-described processing is repeatedly executed until the call recording device 3 performs a call recording end operation.

When the user performs a call recording end operation for instructing the end of the call recording, and proceeds to step S7, the arithmetic unit 32 transmits the voice packets stored in the temporary storage device 31, that is, in each of the upward and downward directions. Out of the compressed voice packets stored separately for each, the upstream voice packet is decompressed and stored in the storage device 3 as voice data.
3 is stored in the storage area for storing the upward sound data.

Next, in step S8, the arithmetic unit 3
2 decompresses the voice packet stored in the temporary storage device 31, that is, the compressed voice packet separately stored in each of the upstream and downstream directions, and expands the downstream voice packet, Is stored in a storage area of the storage device 33 for storing the downward sound data. In this way, the expanded audio data in both the upward and downward directions is separately stored in the storage device 33.

Thereafter, in step S9, the arithmetic unit 32 reads out the ascending and descending expanded audio data from the storage device 33, synthesizes them, and stores the synthesized audio data in the storage device 33.

In this way, by combining and storing voice data in both the up and down directions, it is possible to efficiently record a call.

In the above embodiment, an example in which a device for realizing call recording (call recording device 3) is added as a separate component from the Internet telephone system has been described. However, arithmetic processing such as compression and decompression processing is performed. If there is a computing device to perform and a storage device for storing voice data, it is possible to record a call, so that the central processing unit 22 in the Internet telephone device 2 performs the compression and decompression processing performed by the computing device 32. Thus, the call recording function can be incorporated in the Internet telephone device 2.

Also, a method of separately storing audio data in both directions of up and down in a predetermined storage device and synthesizing the audio data at the time of reproduction can be considered. Before the data is stored, the sound data in both the up and down directions is synthesized, so that the storage capacity required for storing the sound data can be reduced to about half of the conventional capacity. Further, by compressing and storing the synthesized audio data, the storage capacity can be further reduced.

As described above, the following effects can be obtained by using this embodiment. The first effect is that a recording function can be realized in the Internet telephone system.

The second effect is that the compressed voice packet is decompressed, voice data in both the upstream and downstream directions is voice-synthesized and stored in the storage device as one piece of PCM-coded voice data. Compared to the case where the audio data in the direction and the audio data in the downstream direction are stored separately, the audio data in both directions can be stored with a storage capacity about half of the conventional one. Therefore, the storage capacity of the storage device that stores the audio data can be reduced to about half.

A third effect is that if there is an arithmetic unit for performing processing such as compression and decompression of voice data and a storage device for storing voice data, a device for recording a telephone call can be realized. Central processing unit 2 in 2
Second, existing resources can be effectively used by performing processing such as compression and decompression of audio data. Thus, the configuration of the apparatus can be simplified and the cost can be reduced.

In the above embodiment, the case where the PSTN network 4 is connected to the Internet telephone device 2 has been described, but the present invention is not limited to this.

[0029]

As described above, according to the call recording system, the call recording method, and the recording medium according to the present invention, a compressed first voice packet signal transmitted from a first network is received. Receiving the compressed second voice packet transmitted from the second network;
The first voice packet signal is decompressed into packets, first voice data is generated, the second voice packet is decompressed, and the second
Is generated, the first voice data and the second voice data are synthesized, the synthesized voice data is generated, and the generated synthesized voice data is stored. Recording can be performed, and the storage capacity required for recording a call can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of a call recording system according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the embodiment of FIG. 1;

FIG. 3 is a flowchart for explaining the operation of the embodiment of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Network 2 Internet telephone device 3 Call recording device 4 PSTN network 21 Packet input / output device 22 Central processing unit 23 Signal processing unit 24 Line card 31 Temporary storage device 32 Processing device 33 Storage device

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H04M 3/00 H04M 3/16-3/20 H04M 3/38-3/58 H04M 7/00-7 / 16 H04M 11/00-11/10 H04L 12/00-12/66

Claims (6)

(57) [Claims] 1. A call recording system for recording at least a call on an Internet telephone system for transmitting voice packets via the Internet, comprising: a first compressed voice signal transmitted from a first network;
First receiving means for receiving a voice packet signal of the second type, and a second compressed signal transmitted from the second network.
Second receiving means for receiving the first voice packet signal; expanding the first voice packet signal into a decompressed packet;
Packetizing means for generating audio data of the following; expanding means for expanding the second audio packet to generate second audio data; synthesizing the first audio data and the second audio data; A call recording system comprising: a synthesizing unit that generates synthesized voice data; and a storage unit that stores the synthesized voice data generated by the synthesizing unit. 2. The method according to claim 1, wherein the first voice packet received by the first receiving means is stored in a first storage area, and the second voice packet received by the second receiving means is stored in a second storage area. 2. The call recording system according to claim 1, further comprising a temporary storage unit for temporarily storing the call in a storage area of the call. 3. The first voice packet signal transmitted from the first network is a voice packet signal transmitted via a PSTN, and the first voice packet signal transmitted from the second network. The call recording system according to claim 1, wherein the second voice packet is a voice packet transmitted via the Internet. 4. The call recording system according to claim 1, further comprising compression means for compressing the synthesized voice data, wherein the storage means stores the compressed synthesized voice data. 5. A telephone call recording method for recording at least a telephone call on an Internet telephone system transmitting voice packets via the Internet, wherein the compressed first telephone call transmitted from the first network is provided.
A first receiving step of receiving a voice packet signal of
A second receiving step of receiving the first voice packet signal; expanding and converting the first voice packet signal into a first packet;
A packetization step of generating audio data of the following; expanding the second audio packet to generate second audio data; synthesizing the first audio data and the second audio data; A call recording method, comprising: a synthesis step of generating synthesized voice data; and a storage step of storing the synthesized voice data synthesized in the synthesis step. 6. A recording medium on which a program capable of executing the call recording method according to claim 5 is recorded.