Abstract
In 1975, the Canadian Broadcasting Corp. began to perform off-air audits of picture and sound quality of its extensive television and radio services with the aim of discovering how well it was serving its public. The success of an initial feasibility study has led to the regular use of a Quality Assurance Vehicle (QAV) equipped with home receivers and test equipment. This vehicle tours the country making subjective and objective assessments of CBC services. Use of the vehicle has resulted in increased awareness of technical quality by CBC staff and improved quality subsequent to QAV visits. The paper describes the QAV, considers its methods of operation, and discusses some typical test results. It also introduces the concept of standards for the subjective quality of broadcast services, coupled with technical performance specifications for complete delivery systems.
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