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The audio synchronizer receives the DDO signal and in response delays the audio by an equivalent amount, thereby maintaining proper audio-video sync. Modern audio synchronizers operate by digitizing and writing the audio signal into a ring memory, which is most commonly a RAM -based memory having independent read and write ability.
Audio-to-video synchronization (AV synchronization, also known as lip sync, or by the lack of it: lip-sync error, lip flap) refers to the relative timing of audio (sound) and video (image) parts during creation, post-production (mixing), transmission, reception and play-back processing.
Synchronization is important in digital telephony, video and digital audio where streams of sampled data are manipulated. Synchronization of image and sound was an important technical problem in sound film. More sophisticated film, video, and audio applications use time code to synchronize audio and video. [2]
The sync pattern in bits 64 through 79 includes 12 consecutive 1 bits, which cannot appear anywhere else in the time code. Assuming all user bits are set to 1, the longest run of 1 bits that can appear elsewhere in the time code is 10, bits 9 to 18 inclusive. The sync pattern is preceded by 00 and followed by 01.
Pages in category "Audio to video synchronization" The following 7 pages are in this category, out of 7 total. ... Lip sync; P. Papagayo (software) Presentation timestamp
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Audio Stream Input/Output (ASIO) is a computer audio interface driver protocol for digital audio specified by Steinberg, providing high data throughput, synchronization, and low latency between a software application and a computer's audio interface or sound card.
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