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21
Dec

Synchronizing Video and Audio

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Many surveillance operations are enhanced when the ability to record audio is coupled with video. Having an audio and video record of an event paints a more complete picture of what happened and provides more comprehensive evidence of past activities. This concept is not new and has long been understood. However, the challenge has been synchronizing the audio and video correctly so that the words are coming out of the people’s mouths as their lips are moving on the recorded video.

New digital recording technology, such as that offered by Orion Security Solutions, synchronizes the video and audio inputs to overcome the age old issue of latency. Latency can be exemplified by old Asian movies that have been translated where the mouths move, but the words heard don’t match the lip movement. This effect confuses the historic record of the event and lessens the record’s credibility. In fact, recorded evidence is often scrutinized when the words don’t match the lip movements since so many options exist for overlaying audio files on recorded video, but few exist that legitimately synchronize the two inputs.

The secret to providing synchronized audio and video lies in the way the two information streams are compressed and decoded. Efforts to process the audio and video independently and then overlay them are usually unsuccessful. When the audio and video are compressed together as a simultaneous stream, the streams can be decoded together as a consolidated feed and produce synchronized video and audio. Eliminating the latency between the audio and video feeds produces valid historic evidence of an event.

The uses for recorded video and audio files are numerous. Many uses are standard and others are customized for specific applications. Regardless of the use and application, synchronizing the audio and video streams is always crucial to ensure the integrity of the recorded evidence.

Orion Security Solutions would like to wish you a very Merry Christmas and a Happy New Year. We appreciate you following our blogs and look forward to providing more exciting insights into the world of technical security every Wednesday here at The O.

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Sean Crain is founder and CEO of Orion Security Solutions (OSS). Prior to starting OSS, Sean spent over eight years with the U.S. Department of State as a Diplomatic Security Service (DSS) Officer working in nearly 40 countries on 6 continents around the world including Thailand, Vietnam, Burma, Switzerland, Indonesia, Australia, Cambodia, Austria, Germany, Poland, Kenya, Uganda, Egypt, Brazil, Peru, and Columbia.



He received advanced training in the techniques and methodologies of counter intelligence and anti-terrorism in order to carry out responsibilities which included designing, installing, and maintaining state-of-the-art security solutions to protect national security information, U.S Embassies and other sensitive U.S. facilities, and diplomatic personnel, including U.S. Presidents and Secretaries of State. Sean was also called upon to design and implement security protocols and systems which included video surveillance, intruder detection, access controls, locks, perimeter security, and assessments. He also played an integral role in writing the U.S. Department of State security policies for post communications centers, controlled access areas, and building management systems in U.S. Embassies, U.S. Consulates, and inter-agency facilities worldwide.