Method, apparatus, and system for adjusting multimedia encoding rate
A method, an apparatus, and a system for adjusting a multimedia encoding rate are disclosed. The method includes: obtaining an expected multimedia encoding rate by using the available network bandwidth corresponding to the transmission path of a multimedia service, the expected QoE of the multimedia service, and the current multimedia encoding rate as input parameters and according to a preset multimedia resource policy decision, where the expected multimedia encoding rate is used as a reference for adjusting the current multimedia encoding rate. With the present disclosure, under the current network performance, an optimal point for balancing the effects of the media encoding rate and the network performance on the QoE is found by adjusting the multimedia encoding rate, thus achieving optimal QoE. In this way, the adjustment process is simple and fast and the success rate is high, thus improving the QoE.
1. A method for adjusting a multimedia encoding rate, comprising:
obtaining an available network bandwidth corresponding to a transmission path of a multimedia service;
obtaining expected quality of experience (QoE) of the multimedia service and a current multimedia encoding rate of the multimedia service;
obtaining a multimedia resource decision model, wherein the multimedia resource decision model is determined from by a combination of a QoE evaluation model and a QoE relation from among the QoE, the current media encoding rate, and the available network bandwidth, and wherein the QoE relation is obtained through constant training on the multimedia resource decision model according to subjective measurement values; and
obtaining an expected multimedia encoding rate which is determined from the obtained multimedia resource decision model, wherein the multimedia resource decision model utilizes the available network bandwidth, the expected QoE of the multimedia service, and the current multimedia encoding rate of the multimedia service as input parameters, and wherein the expected multimedia encoding rate is used as a reference for adjusting the current multimedia encoding rate by a multimedia resource control server.
2. The method of claim 1 , wherein:
the available network bandwidth corresponding to the transmission path of the multimedia service is a minimum value of available bandwidths of multiple physical links on the transmission path of the multimedia service.
3. The method of claim 1 , wherein obtaining the expected QoE of the multimedia service comprises one of the following:
querying for and obtaining the expected QoE of the multimedia service according to a multimedia service request or a multimedia service QoE improvement request sent from a user, and
obtaining the expected QoE according to a multimedia service request or a multimedia service QoE improvement request that carries the expected QoE of the multimedia service sent from the user.
4. The method of claim 3 , further comprising:
when querying for and obtaining the expected QoE of the multimedia service according to the multimedia service request or multimedia service QoE improvement request sent from the user, requesting the user to send the expected QoE of the multimedia service if failing to find the expected QoE of the multimedia service.
5. The method of claim 1 , wherein the preset multimedia resource decision model forms a QoE relation among the available network bandwidth corresponding to the transmission path of the multimedia service, the expected QoE, the current multimedia encoding rate, and the expected multimedia encoding rate.
6. A system for adjusting a multimedia encoding rate, comprising a multimedia resource control server and a network resource control server, wherein:
the multimedia resource control server is configured to:
interact with the network resource control server to obtain an available network bandwidth corresponding to a transmission path of a multimedia service;
obtain a multimedia resource decision model, wherein the multimedia resource decision model is determined from by a combination of a QoE evaluation model and a QoE relation from among the QoE, the current media encoding rate, and the available network bandwidth, and wherein the QoE relation is obtained through constant training on the multimedia resource decision model according to subjective measurement values;
obtain an expected multimedia encoding rate which is determined from the obtained multimedia resource decision model, wherein the multimedia resource decision model utilizes the available network bandwidth an expected quality of experience (QoE) of the multimedia service, and a current multimedia encoding rate of the multimedia service as input parameters, and wherein the expected multimedia encoding rate is used as a reference for adjusting the current multimedia encoding rate; and
the network resource control server is configured to: determine the available network bandwidth according to a request sent from the multimedia resource control server, and return the available network bandwidth to the multimedia resource control server.
7. The system of claim 6 , wherein the available network bandwidth corresponding to the transmission path of the multimedia service is a minimum value of available bandwidths of multiple physical links on the transmission path of the multimedia service.
8. The system of claim 6 , further comprising:
a network device, configured to receive the expected media encoding rate sent from the multimedia resource control server, and output a multimedia service corresponding to the expected multimedia encoding rate.
9. The system of claim 8 , wherein the network device is a multimedia server configured to adjust and regenerate multimedia resources.
10. The system of claim 8 , wherein the network device is a network device configured to adjust and regenerate multimedia resources.