Absolute Time Code also known as A.T.C is specific type of time code that is automatically encoded into the subcode area of a digital tape machine. The machine uses this time code for auto-locating and for inter-machine synchronization. Many digital tape machines allow the ATC to be converted to SMPTE for other applications. Unlike SMPTE and other types of time code, ATC always starts at zero at the beginning of the tape.
What is Absolute Time Code? Table of Contents
How does Absolute Time Code work?
Absolute Time Code is recorded onto the tape as a series of 16-bit binary numbers, representing hours, minutes, seconds, and frames. The timecode starts at 00:00:00:00 at the beginning of the tape and continues to count up until the end of the recording. Each time the tape is played, the machine reads the ATC and displays the current timecode on the screen. This allows the user to quickly locate specific points on the tape and make accurate edits.
What makes Absolute Time Code different from other types of timecode?
Unlike other types of timecode, such as SMPTE or MIDI Time Code, ATC always starts at zero at the beginning of the tape. This is because ATC is recorded directly onto the tape itself, rather than being generated externally. This makes ATC more reliable and accurate, as there is no chance of the timecode drifting out of sync with the tape.
What are the benefits of using Absolute Time Code?
ATC is an essential tool for audio and video recording, as it allows for precise editing and synchronization between multiple machines. Some benefits of using ATC include:
- Accurate editing: With ATC, it is easy to locate specific points on the tape and make precise edits, down to the frame level.
- Synchronization: ATC allows multiple machines to be synchronized together, making it easy to transfer recordings between machines and maintain perfect synchronization.
- Reliability: ATC is recorded directly onto the tape, making it more reliable and less prone to drift than other types of timecode.
- Compatibility: Many digital tape machines allow ATC to be converted to SMPTE for other applications, making it a versatile and widely used timecode.
How is Absolute Time Code used in the real world?
ATC is used in a variety of applications, including:
- Film and video production: ATC is essential for editing and post-production, as it allows for precise synchronization and editing of audio and video recordings.
- Broadcast television: ATC is used in broadcast television to ensure that all recordings are precisely timed and synchronized.
- Music production: ATC is often used in music production to synchronize multiple machines and ensure accurate timing of recordings.
- Scientific research: ATC is used in scientific research to synchronize multiple sensors and data streams, ensuring that all data is accurately time-stamped and synchronized.