Video Quality Assessment Method and Apparatus

• US 20140328198A1
• Filed: 07/15/2014
• Published: 11/06/2014
• Est. Priority Date: 04/23/2012
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Gao, Shan, Sun, Lina, Xie, Qingpeng
• Granted Patent: US 9,419,875 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04L 43/0835 One way packet loss
• CPC Class Codes: H04N 17/00 Diagnosis, testing or measuring for television systems or their details
• CPC Class Codes: H04N 17/02 for colour television signals
• CPC Class Codes: H04N 19/89 involving methods or arrangements for detection of transmission errors at the decoder

Abstract

A video quality assessment method and a video quality assessment apparatus are provided. The method includes: acquiring parameter information of video data, where the parameter information includes a bit rate, a frame rate, and packet information; performing calculation according to the bit rate or the frame rate to obtain benchmark video quality of the video data; calculating the number of successively lost packets according to the packet information, and calculating the number of effective packet loss times; performing calculation according to the number of effective packet loss times to obtain video packet loss and distortion quality of the video data; and performing calculation according to the benchmark video quality and the video packet loss and distortion quality to obtain final video quality. Using the number of effective packet loss times can accurately assess videos more effectively and reduce algorithm complexity.

Claims

1. A video quality assessment method, comprising:

acquiring parameter information of video data, wherein the parameter information comprises a bit rate, a frame rate, and packet information;

performing a calculation, according to the bite rate or frame rate, to obtain benchmark video quality of the video data;

calculating the number of successively lost packets according to the packet information, and calculating the number of effective packet loss times according to the number of successively lost packets and a first packet threshold;

performing a calculation according to the number of effective packet loss times to obtain video packet loss and distortion quality of the video data; and

performing a calculation according to the benchmark video quality and the video packet loss and distortion quality to obtain final video quality.

2. The video quality assessment method according to claim 1, wherein calculating the number of effective packet loss times according to the number of successively lost packets and the first packet threshold comprises:

updating a count value of the number of packet losses according to the number of successively lost packets and the first packet threshold when the number of successively lost packets is greater than the first packet threshold; and

repeating the foregoing steps until the to-be-assessed video data is processed completely, wherein the count value of the number of packet losses is the number of effective packet loss times.

3. The video quality assessment method according to claim 2, wherein the method further comprises updating the count value of the number of packet losses according to the number of successively lost packets when the number of successively lost packets is not greater than the first packet threshold.

4. The video quality assessment method according to claim 3, wherein updating the number of effective packet loss times according to the number of successively lost packets comprises:

calculating the number of correctly received packets between two packet losses according to the packet information;

adding one to the count value of the number of packet losses when the number of successively lost packets is not greater than a second packet threshold and the number of correctly received packets is greater than the second packet threshold; and

updating the count value of the number of packet losses according to the number of correctly received packets and the second packet threshold when the number of correctly received packets is not greater than the second packet threshold.

5. The video quality assessment method according to claim 3, wherein updating the count value of the number of packet losses according to the number of successively lost packets further comprises:

calculating the number of correctly received packets between two packet losses according to the packet information;

updating the count value of the number of packet losses according to the number of successively lost packets and the second packet threshold when the number of successively lost packets is greater than a second packet threshold and the number of correctly received packets is greater than the second packet threshold; and

updating the count value of the number of packet losses according to the number of successively lost packets, the number of correctly received packets, and the second packet threshold when the number of correctly received packets is not greater than the second packet threshold.

6. The video quality assessment method according to claim 1, wherein the first packet threshold is set according to the bit rate or the frame rate.

7. The video quality assessment method according to claim 1, wherein the method further comprises before performing the calculation according to the number of effective packet loss times to obtain video packet loss and distortion quality, directly determining a preset level to be the final video quality when the number of effective packet loss times of the video data is greater than a preset third threshold.

8. A video quality assessment apparatus, comprising:

an acquiring module configured to acquire parameter information of video data, wherein the parameter information comprises a bit rate, a frame rate, and packet information;

a benchmark quality generating module configured to perform calculation according to the bit rate or the frame rate obtained by the acquiring module to obtain benchmark video quality of the video data;

an effective packet loss times generating module configured to calculate the number of successively lost packets according to the packet information, and calculate the number of effective packet loss times according to the number of successively lost packets and a first packet threshold;

a packet loss and distortion quality generating module configured to perform calculation according to the number of effective packet loss times obtained by the effective packet loss times generating module to obtain video packet loss and distortion quality of the video data; and

a final quality generating module configured to perform calculation according to the benchmark video quality obtained by the benchmark quality generating module and the video packet loss and distortion quality obtained by the packet loss and distortion quality generating module to obtain final video quality.

9. The video quality assessment apparatus according to claim 8, wherein the effective packet loss times generating module comprises:

a determining unit configured to determine whether the number of successively lost packets is greater than the first packet threshold; and

a packet loss times count value unit,

wherein the packet loss times count value unit is configured to update a count value of the number of packet losses according to the number of successively lost packets and the first packet threshold when the number of successively lost packets is greater than the first packet threshold,

wherein the foregoing steps are repeated until the to-be-assessed video data is processed completely, and

wherein the count value of the number of packet losses is the number of effective packet loss times.

10. The video quality assessment apparatus according to claim 9, wherein the packet loss times count value unit is further configured to update the count value of the number of packet losses according to the number of successively lost packets when the number of successively lost packets is not greater than the first packet threshold.

11. The video quality assessment apparatus according to claim 10, wherein the packet loss times count value unit is further configured to:

calculate the number of correctly received packets between two packet losses according to the packet information;

add one to the count value of the number of packet losses when the number of successively lost packets is not greater than a second packet threshold and the number of correctly received packets is greater than the second packet threshold; and

update the count value of the number of packet losses according to the number of correctly received packets and the second packet threshold when the number of correctly received packets is not greater than the second packet threshold.

12. The video quality assessment apparatus according to claim 10, wherein the packet loss times count value unit is further configured to:

calculate the number of correctly received packets between two packet losses according to the packet information;

update the count value of the number of packet losses according to the number of successively lost packets and the second packet threshold when the number of successively lost packets is greater than a second packet threshold and the number of correctly received packets is greater than the second packet threshold; and

update the count value of the number of packet losses according to the number of successively lost packets, the number of correctly received packets, and the second packet threshold when the number of correctly received packets is not greater than the second packet threshold.

13. The video quality assessment apparatus according to claim 8, wherein the first packet threshold is set according to the bit rate or the frame rate.

14. The video quality assessment apparatus according to claim 8, further comprising a direct determining module, wherein the direct determining module is configured to directly determine a preset level to be the final video quality when the number of effective packet loss times of the video data is greater than a preset third threshold, and wherein the number of effective packet loss times is obtained by the effective packet loss times generating module.

15. A video quality assessment apparatus, comprising:

a video parameter collecting module configured to acquire parameter information of video data, wherein the parameter information comprises a bit rate, a frame rate, and packet information;

a benchmark video quality acquiring module configured to perform calculation according to the bit rate or the frame rate obtained by the video parameter collecting module to obtain benchmark video quality of the video data;

an effective packet loss times acquiring module configured to calculate the number of correctly received packets between two successive packet losses according to the packet information obtained by the video parameter collecting module, and calculate the number of effective packet loss times according to the number of correctly received packets and a second packet threshold;

a packet loss and distortion quality acquiring module configured to perform calculation according to the number of effective packet loss times obtained by the effective packet loss times acquiring module to obtain video packet loss and distortion quality of the video data; and

a final quality acquiring module configured to perform calculation according to the benchmark video quality obtained by the benchmark video quality acquiring module and the video packet loss and distortion quality obtained by the packet loss and distortion quality acquiring module to obtain final video quality.

16. The video quality assessment apparatus according to claim 15, wherein the effective packet loss times acquiring module comprises:

a packet number acquiring unit configured to calculate the number of correctly received packets between two successive packet losses according to the packet information; and

an effective packet loss times count value unit configured to add one to a count value of the number of packet losses when the number of correctly received packets is greater than the second packet threshold, and update the count value of the number of packet losses according to the number of correctly received packets and the second packet threshold when the number of correctly received packets is not greater than the second packet threshold,

wherein the foregoing steps are repeated until the to-be-assessed video data is processed completely, and

wherein the count value of the number of packet losses is the number of effective packet loss times.

17. The video quality assessment apparatus according to claim 15, wherein the effective packet loss times count value unit is further configured to calculate the number of successively lost packets according to the packet information, and update the count value of the number of packet losses according to the number of successively lost packets and a first packet threshold.

18. The video quality assessment apparatus according to claim 16, wherein updating the count value of the number of packet losses according to the number of successively lost packets and the first packet threshold comprises:

updating the count value of the number of packet losses according to the number of successively lost packets and the first packet threshold when the number of successively lost packets is greater than the first packet threshold; and

updating the count value of the number of packet losses according to the number of successively lost packets when the number of successively lost packets is not greater than the first packet threshold.

19. The video quality assessment apparatus according to claim 15, wherein the second packet threshold is set according to the bit rate or frame rate.

20. The video quality assessment apparatus according to claim 15, further comprising a video quality determining module, wherein the video quality determining module directly determines a preset level to be the final video quality when the number of effective packet loss times of the video data is greater than a preset third threshold, and wherein the number of effective packet loss times is obtained by the effective packet loss times acquiring module.