But, that subcode is different from theatrical films. For the same reason as theatrical releases, Blu-ray films are also embedded with a subcode. The second use is to protect Blu-ray copies of films from being pirated. After all, what is a movie without audio? recorded from the screen), the Cinavia watermarking will also be recorded in the audio. So, if a theatrical release is CAMed (i.e. Keep in mind that just because the subcode cannot be heard by human ears, it doesn’t mean it can’t be heard and decoded by a specialty hardware chip. Because the audio watermarking is audible, but imperceptible, it will be picked up by microphones (strictly because of the Hz range where the subcode is embedded). The first use is to protect theatrical releases from being pirated. There are two types of known uses of Cinavia watermarking. How is Cinavia used in the film industry? Likely, it’s also an analog audio-based digital carrier subcode (like a modem tone) that contains data about the title being played. This Cinavia watermark audio subcode seems to be embedded at a phase and frequency that can be easily isolated and extracted from an audio soundtrack, then processed and determined if it’s valid for the movie title being played back. No, it is solely created for industry media protection. Don’t be fooled by the ad with smiling children on the Verance site, this has nothing to do with helping make audio better for the consumer. Let’s explore.Ĭinavia is an audio watermarking technology created by the company Verance where an audio subcode is embedded within digital audio soundtracks at humanly imperceptible levels, but at a level where a DSP or other included hardware chip can read and decode its presence. If you’re into playing back movies on your PS3, you might have run into an annoying problem where your movie plays for about 20 minutes, then the audio suddenly drops out entirely with a warning message on the screen.
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