| 主权项 |
1. Method A method to find wanted media material in a media stream comprising wanted and unwanted media material, where a selected search key is a representation of a part of said wanted media material, said method comprising the steps of:
searching for said search key in said media stream; selecting a first segment of said media stream that contains said search key; selecting at least one second segment of said media stream that contain said search key; comparing said first segment with said second segment; and where a common segment between said first and second segment is decided to be said wanted media material, performing the search for said wanted media material in a digitally encoded domain of said media stream, wherein said selection of said search key, said search for and selection of said segments, said comparison of said segments, and an extraction of said wanted media material is done before decoding said media stream from the digitally encoded domain into a decoded domain, wherein said digitally encoded media stream is divided into frames of digital information, wherein each frame comprises a header and a body, wherein said body comprises one information part and one data part, wherein said information part comprises unique information pertaining to the data in said data part, wherein said unique information is extracted from said media stream forming a compressed representation of said media stream, wherein said search key is selected from said compressed representation, wherein said search and comparison is made in said compressed representation, and wherein the full information pertaining to said wanted media material is collected from said media stream by means of said compressed representation of said wanted media material. |
