KR20000038685A - Method for adjusting receiving voice packet interval of voice communication through ip network - Google Patents

Abstract

PURPOSE: A method for adjusting a receiving voice packet interval of a voice communication through an IP network is provided for users to listen to a continued voice by selecting a packet having the smallest voice signal to thereby extend or remove the voice packet when an IP packet is received more slowly or more quickly than a voice speed. CONSTITUTION: A speed of a voice packet received from an IP network is checked in a voice communication through the network. The smallest packet is selected from a successive voice packets in case that the received voice packet is received slower than a voice speed constantly. The difference between the voice listened by being inserted next to the selected packet and its original voice are minimized.

Description

Receiving voice packet interval control method of voice communication through IP network

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for maintaining a constant packet interval of a received voice in voice communication over an Internet Protocol (IP) network, particularly when an IP packet is received later than a voice rate or faster than a voice rate. The present invention relates to a method for adjusting the received voice packet interval of voice communication through an IP network, by selecting a packet having the smallest signal and increasing or removing the voice packet so that continuous voice can be heard.

Recently, in order to reduce the communication cost, voice communication (for example, voice communication on an Internet phone or a LAN network) on an IP (Internet Protocol) network has gradually been put into practical use. Techniques for maintaining a call state are being developed.

Description of the present invention as described above will be described later.

In the conventional method for receiving voice packet control of voice communication through an IP network, a receiving step of receiving a voice packet of a transmitting party through an IP network, a delay step of initially delaying the received voice packet by a predetermined frame, In the above step, a communication step is performed to sequentially listen to the next frame delayed initially.

Looking at the prior art made of each step as follows.

As shown in Fig. 1, when a voice call is made between two terminals (e.g., phones A and B) or more terminals (e.g., phones A, B and a PC) on an IP network, every one time Once (usually 20nsec-90msec is called one frame of voice), voice is made into IP packet and sent to the other terminal.

For example, the voice packet is transmitted from the telephone terminal A of the transmitting terminal to the telephone network B of the receiving terminal at a predetermined time interval as shown in FIG.

In Fig. 2 (a), 1,2,3, ..., 9 are voice packet numbers.

However, the time interval of the voice packet received in the IP network occurs when packets 4, 5, 6 of FIG. 2 (b) are delayed.

Therefore, after the third voice frame, no voice is heard, so the voice is cut off and heard.

In order to prevent the voice from being cut off in this way, the telephone B, the receiving terminal, does not accept the voice packet in the first few frames, for example, 2-5 frames as shown in FIG. 2 (c), and sequentially from the next frame. Accept it and prevent the sound from being cut off.

In other words, in the IP network, due to the characteristics of the network, the communication speed of all data including voice is not constant. Therefore, the terminal receiving the voice packet has several voice buffers to prevent the voice that may be generated due to the voice packet delay being cut off. The listening voice is delayed by the number of voice buffers than the voice speed received at the terminal.

That is, even if the next voice packet comes in late, it can prevent the voice from being cut off due to the voice buffer to some extent.

However, in the prior art as described above, when the voice transmission / reception rate between two terminals does not exactly match in a voice call on an IP network (for example, due to a time error between two terminals, one terminal transmits every 30 msec and the other terminal Is faster than 30msec or later) The speed at which the voice is heard is the same as the speed at which the voice is sent. Therefore, the voice disconnection occurs at one of the two terminals, and the voice delay is continuously accumulated at the other terminal. There is a problem that hearing is very late than the voice actually sent.

Accordingly, an object of the present invention for solving the conventional problems as described above is a method of adjusting the received voice packet interval of voice communication through the IP network to reduce the phenomenon of speech interruption, and to prevent the delay of the accumulated voice is long In providing.

Another object of the present invention is to select a smaller voice signal when the voice IP packet is received at a certain rate later than the voice speed, so that the voice is increased to minimize the difference between the changed voice and the original voice. The present invention provides a method for adjusting the received voice packet interval of communication.

Another object of the present invention is to prevent the voice delay from increasing continuously by selecting and removing a small voice signal when the voice IP packet is received at a certain rate later than the voice speed, and the difference between the changed voice and the original voice. The present invention provides a method for controlling the received voice packet spacing of voice communication through an IP network.

Another object of the present invention is to provide a method for adjusting the received voice packet interval of voice communication through an IP network such that the voice is naturally heard by reducing or increasing the packet having the smallest size of the voice signal so that the voice can be heard constantly. have.

1 is a configuration diagram of voice communication through an IP network.

FIG. 2 is a conceptual diagram illustrating transmission and reception of voice packets between terminals in FIG. 1.

3 is a diagram illustrating transmission and reception of a voice packet when a voice IP packet is received at a certain time later than a voice that is heard.

4 is a diagram illustrating transmission and reception of a voice packet when a voice IP packet is received consistently faster than a voice that is heard.

Figure 5 is an explanatory diagram showing an example of adjusting the received voice packet interval in the present invention.

The present invention for achieving the above object is a first step of checking the speed of the voice packet received in the network during the voice communication over the IP network, and the continuous voice when the received voice packet is consistently slower than the voice speed And a third step of selecting a packet having the smallest size among the packets, and a third step of inserting the selected packet by the silent period to minimize the difference between the listening voice and the original voice.

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

In the present invention, a method for adjusting the received voice packet interval for voice communication through an IP network includes: a first step of checking a speed of a voice packet received from a network during voice communication through an IP network; A second step of selecting a packet having the smallest size among consecutive voice packets at a constant late reception, and a third step of inserting the selected packet by a silent period to minimize the difference between the listening voice and the original voice. .

In addition, the present invention provides a first step of checking the speed of the voice packet received in the network during voice communication over the IP network, and the size of the continuous voice packets when the received voice packet is consistently faster than the voice speed A second step of selecting a small packet, a third step of removing the selected packet, and repeating the second step and the third step as much as the silence period to minimize the difference between the listening voice and the original voice. Fourth step.

Looking at the operation and the effect of the present invention made of each step as follows.

On the IP network, terminals capable of voice communication through this network are installed and operated.

In the present invention, the case where the IP phone A transmits a voice and the IP phone B receives a voice will be described.

When the IP phone A transmits and receives the voice at a predetermined time interval and receives the IP at a predetermined time interval, there is no problem so that a normal voice call can be made without additional voice processing.

However, as shown in FIG. 3 (a), the IP packet A, which is the transmitting terminal, transmits the voice packets at regular intervals, but is received at a later time than the voice speed as shown in FIG. 3 (b) on the IP network, that is, the voice packet number 1 -It accepts 4 frames of voice packets up to 4 times, skips 5 times, accepts 4 frames of voice packets up to 5-8, and skips 10 times.

As described above, if the voice packet of 4 frames is received and skipped once and the voice packet of 4 frames is received again and regularly, such as skipping once, the voice is continuously interrupted.

Voices are inserted to prevent these voices from breaking.

Then, in the method of inserting the voice, the packet with the smallest voice energy (the packet with the smallest voice level (level)) is selected among the entire sections where the voice is not interrupted but not inserted uniformly at the end of the voice. To double that voice packet.

In other words, the packet having the lowest voice energy is selected among consecutive voice packets, and the selected packet is made one more and inserted after the smallest packet.

Then, even if the signal is increased in the smallest part of the voice energy, you will not be able to feel the increase in the voice.

As another method of increasing the voice, as shown in FIG. 5, the average value of two signals before and after the silent section is obtained and inserted into the silent section.

In this way, voice is cut off as naturally as possible during the call.

In addition, as shown in FIG. 4 (a), voice packets are transmitted at regular intervals from the IP phone A, which is a transmitting terminal, and when the voice packet is received at a faster rate than the voice speed as shown in FIG. If the voice packet is not removed in the fast receiving section, the voice continues to accumulate in the buffer, and the voice speed is continuously heard, so the voice delay is continuously increased.

Therefore, the packet with the lowest energy is selected among the voice packets in the section that is quickly received, and the packet is removed.

This prevents the delay from ever increasing.

And, by eliminating the packet with the smallest energy size, the listening voice can minimize the difference from the original voice.

As a result, when the IP packet is received later than the voice rate or faster than the voice rate, the packet having the smallest voice signal is selected and the voice packet is increased or removed to prevent the voice from being broken during the call. It allows you to hear a series of voices.

Accordingly, the present invention prevents the accumulation of audible voice delays or voice delays that may be caused when voice packets are given on the network or the voice transmission / reception speeds of both terminals are not exactly matched during an IP call on an IP network. There is an effect to increase.

Claims (3)

A first step of checking the speed of a voice packet received in a network during voice communication over an IP network; and selecting a packet having the smallest size among consecutive voice packets when the received voice packet is received at a later rate than the voice speed. And a third step of minimizing the difference between the sound heard and the original sound inserted after the packet selected above. The method of claim 1, wherein in the second step, instead of the smallest packet, an average value of two signals before and after the silent section is obtained and inserted into the silent section to obtain the same effect. Receiving voice packet interval control method. A first step of checking the speed of a voice packet received in a network during voice communication over an IP network; and selecting a packet having the smallest size among consecutive voice packets when the received voice packet is consistently faster than the voice speed. And a third step of removing the selected packet, and a second step of repeating the second step and the third step by removing the silence section to minimize the difference between the listening voice and the original voice. Receiving voice packet interval control method of voice communication through the IP network, characterized in that made.