Unified video quality score assessment using fuzzy logic

A non-transitory computer-readable storage medium having stored thereon computer executable instructions, which when executed by a computing device, cause the computing device to be operable for:

• receiving a plurality of metric values for quality of service based on delivering content in a content delivery system;
• converting respective metric values into a fuzzy value in a plurality of possible fuzzy values, wherein a plurality of fuzzy values is determined;
• determining a plurality of fuzzy rules, wherein a fuzzy rule is associated with a fuzzy value;
• applying respective conditions for fuzzy rules in the plurality of fuzzy rules to the plurality of fuzzy values to determine one or more fuzzy rules that have conditions met, wherein a fuzzy rule applies when respective conditions for the fuzzy rule are met by one or more fuzzy values in the plurality of fuzzy values;
• determining a fuzzy output from one or more fuzzy values that are associated with the one or more fuzzy rules that have conditions met;
• calculating a unified quality score for a quality of experience based on the fuzzy output;
• and
• outputting the unified quality score, wherein the unified quality score is used to adjust the content delivery system;
• and
• adjusting a parameter in an encoder in the content delivery system to encode content differently based on the unified quality score.

An apparatus comprising:

• one or more computer processors;
• and
• a computer-readable storage medium comprising instructions for controlling the one or more computer processors to be operable for:
• receiving a plurality of metric values for quality of service based on delivering content in a content delivery system;
• converting respective metric values into a fuzzy value in a plurality of possible fuzzy values, wherein a plurality of fuzzy values is determined;
• determining a plurality of fuzzy rules, wherein a fuzzy rule is associated with a fuzzy value;
• applying respective conditions for fuzzy rules in the plurality of fuzzy rules to the plurality of fuzzy values to determine one or more fuzzy rules that have conditions met, wherein a fuzzy rule applies when respective conditions for the fuzzy rule are met by one or more fuzzy values in the plurality of fuzzy values;
• determining a fuzzy output from one or more fuzzy values that are associated with the one or more fuzzy rules that have conditions met;
• calculating a unified quality score for a quality of experience based on the fuzzy output;
• and
• outputting the unified quality score, wherein the unified quality score is used to adjust the content delivery system;
• and
• adjusting a parameter in an encoder in the content delivery system to encode content differently based on the unified quality score.