Design & Implementation Of TV Ads Monitor System

TV Advertising is an important part of daily life, through which people know what products they like or dislike. But as the important effects it takes on, it is more and more urgent for us to monitor whether the right ads is on TV.In this paper, we present a solution to solve the problem of ads monitor. It consists of video collection, audio match and user interface. And much more, the audio match algorithm will be the main point of this paper.The audio match algorithm includes two parts: One is extracting the audio characters of the ads;the other is match between two audios using the characters have been extracted.Before extracting the audio characters, we learn that pitch and MFCC are the useful characters in music match. And we can't decide which should be the right one for the ads monitor system. At last through the test that we made for the two characters, we find the MFCC has better effect than pitch. So MFCC becomes the audio character we used in ads monitor system.During the match between two audios, we suffer a great of problems, like large amount of data, slow speed of match and different lengths of two audios. To solve these problems, we apply the technology of Vector Quantity, two stages of match and Dynamic Time Warping.In the Vector Quantity, because to make a codebook for all ads is impossible, so we make a codebook for each ad. And in quantity, we decide if the distance between the input vector and codebook is large than the max distance, which we define before quantity, then the input vector will not in the region of the codebook.During the two stages of match, we firstly find the start point of ad through compare the head of ad. After the start point has been found, we compare the whole ad to decide whether the start point is the right one.Then, we present a test which show that our solution can work well on ads monitor system.At last ,we show some details of the implementation.