Identification and analysis of cadence pattern in video

摘要

A system and method for the identification and analysis of cadence pattern is disclosed. The method uses previous and current fields to generate the difference between the field values. The difference of these values along with the field relations is passed to the state machine to generate the state of the top and bottom fields. Based on the top and bottom state the cadence signature is generated and by using the Fourier analysis the principle frequency of repeated cadence pattern signature sequence is identified. Each of the cadence signatures present in the cadence pattern signature sequence is decoded to calculate the pull-down value of the cadence pattern. The pull down value then gives the actual cadence pattern.

主权项

1. A method for cadence sequence identification and analysis in a video stream, said method comprising:
encoding cadence signature for output data obtained from a state machine by a cadence signature generator module; analyzing said encoded cadence signature output from said cadence signature generator module by a data analyzer module; and decoding said signature and identifying repeating cadence pattern in said signature by a cadence pattern estimator module, wherein said decoding the signature and said identifying the pattern comprises the steps of:
employing a cadence signature decoder module that takes cadence pattern signature sequence as input and decodes each said cadence signature pattern to obtain field states; andemploying a Pull-down value calculator for estimating said pull down value by using a state machine and a look up table on the field states.