Quality measurement of audiovisual signals based on digital watermarking

点击翻译按钮获取中文摘要

The quality measurement of image, video, speech and audio is of critical importance in today's video broadcasting, telephony networks, transmission control, and e-commerce, mainly because quality is a key determinant of customer satisfaction and a key indicator of transmission condition. Subjective quality evaluation is highly unsuitable for online monitoring and broadcasting applications and is also very expensive and time consuming. The existing objective quality measurement metrics need the original signal for comparison. This requirement makes these metrics less than optimal for those applications that require audiovisual signals to be broadcasted or transmitted through the data network such as for television video, mobile video, or internet telephony. We propose to measure the quality of audiovisual signals based on digital watermarking. Our recent research achievements have demonstrated the feasibility and promise. We believe that we will be able to propose methods that can measure the quality of not only image and speech, but also video and audio; that can measure the effects of not only JPEG compression and MP3 compression, but also all kinds of common distortions to image, video, speech and audio; and that can measure the effects of not only individual distortion, but also combined multiple distortions. The envisaged quality measurement methods will significantly contribute to the video and audio broadcasting and telephony industries, and other areas such as forensic analysis and content authentication.