1. An apparatus for controlling the quality of service (QoS) of a variable bandwidth multi-codec comprising:
a network state detection unit detecting a network state including at least one of a packet loss ratio, a packet loss interval, and a packet delay time based on a real-time transport protocol (RTP) packet transmitted to and received from a destination for which a call connection is established; and
a codec control unit updating a transmission rate by comparing a detected resultant value based on the detecting network state with an already set reference value and increasing or decreasing the transmission rate, and controlling the variable bandwidth multi-codec to code data with the updated transmission rate,
wherein the network state detection unit detects a network state at predetermined intervals and the predetermined intervals are adjustable via the codec control unit according to the network state such that the predetermined intervals are increased or decreased based on the result of comparing a value of a current detected network state with a value of a previously detected network state.
2. The apparatus of claim 1, wherein the network state detection unit transmits and receives data to test the network state, and
the codec control unit comprises:
a prediction bandwidth determination unit determining a prediction bandwidth based on an interoperation characteristic of the network and the transmitted and received data to test the network state;
a first transmission rate update unit updating the transmission rate by decreasing the transmission rate if the determined prediction bandwidth is less than a previously updated transmission rate;
a second transmission rate update unit comparing the detected resultant value with the already set reference value and updating the transmission rate by increasing or decreasing the transmission rate; and
a control unit controlling the variable bandwidth multi-codec so that coding is performed with the updated transmission rate.
3. The apparatus of claim 1, wherein the codec control unit updates the transmission rate at the predetermined intervals to control the variable bandwidth multi-codec, and the predetermined intervals are increased or decreased based on the result of comparing the value of the currently detected network state with the value of a previously detected network state.
4. The apparatus of claim 1, further comprising a codec quality measuring unit measuring the quality of voice included in a signal received from the destination, and the codec control unit increases or decreases the transmission rate based on the measured quality.
5. A method of controlling the quality of service (QoS) of a variable bandwidth multi-codec comprising:
detecting at predetermined intervals a network state including at least one of a packet loss ratio, a packet loss interval, and a packet delay time based on an real-time transport protocol (RTP) packet transmitted to and received from a destination for which a call connection is established;
adjusting the predetermined intervals by increasing or decreasing the predetermined intervals based on comparison results of a current detected value of the network state with a previously detected value of a network state; and
updating a transmission rate by comparing a detected resultant value based on the detecting network state with an already set reference value and increasing or decreasing the transmission rate, and controlling the variable bandwidth multi-codec to code data with the updated transmission rate.
6. The method of claim 5, wherein the detecting of the network state comprises transmitting and receiving data to test the network state and the updating of the transmission rate and the controlling of the variable bandwidth multi-codec comprises:
determining a prediction bandwidth based on an interoperation characteristic of the network and the transmitted and received data to test the network state;
updating the transmission rate by decreasing the transmission rate if the determined prediction bandwidth is less than a previously updated transmission rate;
comparing the detected resultant value with the already set reference value and updating the transmission rate by increasing or decreasing the transmission rate; and
controlling the variable bandwidth multi-codec so that coding is performed with the updated transmission rate.
7. The method of claim 5, wherein in the updating of the transmission rate and the controlling of the variable bandwidth multi-codec, the transmission rate is updated at the predetermined intervals so that the variable bandwidth multi-codec is controlled.
8. The method of claim 5, further comprising measuring the quality of voice included in a signal received from the destination, and in the updating of the transmission rate and the controlling of the variable bandwidth multi-codec, the transmission rate is increased or decreased based on the measured quality.
9. A computer readable recording medium having embodied thereon a computer program which when executed by a processor, causes the processor to perform the steps of:
detecting a network state including at least one of a packet loss ratio, a packet loss interval, and a packet delay time based on an real-time transport protocol (RTP) packet transmitted to and received from a destination for which a call connection is established;
adjusting a predetermined intervals by increasing or decreasing the predetermined intervals based on comparison results of a current detected value of the network state with a previously detected value of a network state; and
updating a transmission rate by comparing a detected resultant value based on the detecting network state with an already set reference value and increasing or decreasing the transmission rate, and controlling the variable bandwidth multi-codec to code data with the updated transmission rate.
10. The computer readable recording of claim 9, wherein the computer readable recording medium is selected from the group consisting of a read-only memory (ROM), a random-access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for folding an article into a bifold configuration, the method comprising:
a) placing the article onto a folding drum surface, the disposable absorbent article having a leading end portion and a trailing end portion;
b) holding the article to the folding drum surface with a holding force;
c) transferring at least a portion the leading end portion of the article to a peel-roll surface positioned adjacent the folding drum surface;
d) applying a peel-force to the leading end portion such that the leading end portion is held to the peel-roll surface by the peel-force;
e) holding at least a portion of the trailing end portion to the folding drum surface;
f) transferring the leading end portion from the peel-roll surface to a movable surface of a vacuum conveyor, the movable surface of the vacuum conveyor configured to have a first speed and a second speed, the movable surface of the vacuum conveyor being driven by a drive mechanism coupled to the movable surface of the vacuum conveyor, the leading end portion being transferred to the movable surface of the vacuum conveyor when the movable surface of the vacuum conveyor engages the leading end portion at the first speed, the movable surface of the vacuum conveyor being configured to apply a vacuum force to the leading end portion when the movable surface of the vacuum conveyor engages the leading end portion;
g) holding the leading end portion from (f) to the movable surface of the vacuum conveyor with the vacuum force;
h) accelerating the movable surface of the vacuum conveyor to the second speed; and
i) transferring the leading end portion from the movable surface of the vacuum conveyor to the folding drum.
2. The method of claim 1, wherein the vacuum conveyor is coupled to a positioning mechanism, the positioning mechanism configured to position the movable surface of the vacuum conveyor in a first position and a second position, the distance between the movable surface of the vacuum conveyor and the peel-roll surface in the first position being less than the distance between the movable surface of the vacuum conveyor and the surface of the peel-roll in the second position.
3. The method of claim 2, wherein the leading end portion is engaged by the movable surface of the vacuum conveyor when the movable surface of the vacuum conveyor is in the first position.
4. The method of claim 2, wherein the leading end portion is transferred to the folding drum from the movable surface of the vacuum conveyor when the movable surface of the vacuum conveyor is in the second position.
5. The method of claim 2, wherein the positioning mechanism varies the position of the movable surface of the vacuum conveyor from about 1 mm to 20 cm from the peel-roll surface.
6. The method of claim 2, wherein the positioning mechanism continuously varies the position of the movable surface of the vacuum conveyor.
7. The method of claim 1, wherein the leading end portion is transferred to the folding drum from the movable surface of the vacuum conveyor at the second speed.
8. The method of claim 1, wherein the folding drum surface has a folding drum surface speed, and the folding drum surface speed and the second speed are substantially the same.
9. The method of claim 1, wherein the first speed is zero.
10. The method of claim 1, wherein a portion of the article is secured to the folding drum with a securing force.
11. The method of claim 10, wherein the securing force is provided by movable clamps.
12. The method of claim 10, wherein the article includes first and second opposing longitudinal side edges and a lateral centerline and the securing force is applied to the lateral centerline portion of at least one of the side edges.
13. The method of claim 1, wherein the leading end portion is separated from the peel-roll surface prior to being transferred to the movable surface of the vacuum conveyor.
14. The method of claim 1, wherein the movable surface of the vacuum conveyor engages the leading end portion while the leading end portion is held to the peel-roll surface.
15. The method of claim 1, wherein the peel-force is at least one of reduced or removed prior to engaging the leading end portion with the movable surface of the vacuum conveyor.
16. The method of claim 1, wherein the article is aligned when the article is bifolded.
17. A bifolded article produced according the method of claim 1.
18. A method for folding an article into a bifold configuration, the method comprising:
a. placing the article onto a folding drum surface, the disposable absorbent article having a leading end portion and a trailing end portion;
b. holding the article to the folding drum surface with a holding force;
c. transferring at least a portion the leading end portion of the article to a peel-roll surface positioned adjacent the folding drum surface;
d. applying a peel-force to the leading end portion such that the leading end portion is held to the peel-roll surface by the peel-force;
e. holding at least a portion of the trailing end portion to the folding drum surface;
f. transferring the leading end portion from the peel-roll surface to a movable surface of a first vacuum conveyor, the movable surface of the first vacuum conveyor configured to have a first speed and a second speed, the movable surface of the first vacuum conveyor being driven by a drive mechanism coupled to the movable surface of the first vacuum conveyor, the leading end portion being transferred to the movable surface of the first vacuum conveyor when the movable surface of the first vacuum conveyor engages the leading end portion at the first speed, the movable surface of the first vacuum conveyor being configured to apply a vacuum force to the leading end portion when the movable surface of the first vacuum conveyor engages the leading end portion;
g. holding the leading end portion from (f) to the movable surface of the first vacuum conveyor with the vacuum force;
h. accelerating the movable surface of the first vacuum conveyor to the second speed;
i. transferring the leading end portion from the movable surface of the first vacuum conveyor to a second vacuum conveyor, the second vacuum conveyor including a second vacuum conveyor movable surface; and
j. transferring the leading end portion from the second vacuum conveyor movable surface to the folding drum.
19. The method of claim 18, wherein the first vacuum conveyor is coupled to a positioning mechanism, the positioning mechanism configured to position the movable surface of the first vacuum conveyor in a first position and a second position, the distance between the movable surface of the first vacuum conveyor and the peel-roll surface in the first position being less than the distance between the movable surface of the first vacuum conveyor and the surface of the peel-roll in the second position.
20. The method of claim 18, wherein the second vacuum conveyor movable surface moves at a constant speed.