Sökning: "ENF criterion"

Hittade 2 uppsatser innehållade orden ENF criterion.

1. 1. Determining the recording time of digital media by using the electric network frequency

   Uppsats för yrkesexamina på avancerad nivå, Signaler och System

   Författare :Alex Kantardjiev; [2011]
   Nyckelord :ENF; electric network frequency criterion; STFT; Capon;

   Sammanfattning : Authentication of recordings is an important task in forensic sciences. When processing audio or video material, some tasks might be related to determining whether or not the material has been edited or falsified in any way, or in other cases, to determine at what point in time a recording was made. LÄS MER

3. 2. Determining recording time of digital soundrecordings using the ENF criterion

   Uppsats för yrkesexamina på avancerad nivå, Institutionen för systemteknik

   Författare :Fredrik Andersson; [2009]
   Nyckelord :ENF; ENF criterion;

   Sammanfattning : In forensic investigations, verification of digital recordings is an important as-pect. There are numerous methods to verify authentication of recordings, but itis difficult to determine when the media was recorded. By studying the electricalnetwork frequency, one can find a unique signature and then match the recordingto this signature. LÄS MER