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ANALYSIS OF FOREIGN VIDEO AND AUDIO RECORDINGS

As soon as foreign enemy recordings are posted on websites a number of teams within

intelligence circles begin their analyses of the various components of the recording.

Some scrutinize the wording looking for patterns and coded message, some analyze

the voices. and others observe the properties of the electronic file. Under certain

circumstances even the power line frequency can be detected to aid in determination

of location where the recording was made. Yemen, for example uses 50 Hz power

while we, in the U.S. use 60 Hz.

                       Teams examining new tapes:

1. Voice identification – Electronic Analysis

2. Voice identification -  Speech Patterns, and vocabulary

3. Crypto Team – Analyzing possible imbedded messages to cells

4. Electronic Team – Looking for clues as to time and location

Intelligence Analysis of New Tape

Voice Identification - Electronic

• Spectral analysis

      . Comparison with known voices

     Voice Identification-Human Review

• Vocabulary
• Inflection
• Speed of speech
• Slang
• Mispronunciations, misuse of words
• Accents
• Any speech impediments
• Comparison with known archived speech patterns of known voices

      Crypto Team – Computer Analysis

       . Letter, word, and phrase count

• Search for embedded words or phrases
• Search for sub-audible signals

       Electronic Tests

• Spectrum analysis for non-human signals
• Digital Waveform Analysis for transients
• Background sounds as clues
• Electronic Signatures of record machine

       Video Analysis

• Production techniques, i.e. HD, audio, video, music, titles, transitions,
• post-production editing, selective blurring, voice-over segments
• Objects, i.e. vehicles, guns, camera, walking stick, flags
• Weather, shadows, terrain

Finally, tests are performed to detect any hidden digital messages or files

within the audio or video file. Any posted file can contain secret messages.

       Steganography Tests  (Secret Embedded Files Within Files)

• Test for hidden files within audio and video files
• Analysis of file and embedded file for information

         DEMONSTRATION OF STEGANOGRAPHY

    (the concealment of secret messages within a file)

Above is an innocent looking JPG file.

Now, using special software, I have embedded a secret message, actually three, within the JPG file.

It looks the same, right? That's the idea of Steganography. It is the process by which

a hidden message can be transmitted without making anyone aware of its existence.

Decoding, we obtain:

The first two messages seem harmless enough. It is the third message that is troubling.

The question is, do Youtube and Hulu, etc. scan the uploaded files for secret content?

And does the Government have any input in doing this? Food for thought.

For more information contact:

Paul Ginsberg, President

Professional Audio Laboratories, Inc.

www.proaudiolabs.com

@ProAudioLabs

(914) 263-8010

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