- latency
- Of a filter, the amount of time it takes the filter to process a sample.
- letterbox
- Video display format in which the video is sized as large as possible inside the display window, without any cropping or stretching.
- locked audio
- A digital video format in which the number of audio samples in a frame follows a specific distribution. For example, in NTSC 48-kHz locked audio, frame 1 contains 1600 samples and frames 25 each contain 1602 samples. Unlocked audio allows the number of samples to vary, although the average must equal the stated sample rate.
- lookahead
- Using data from later in the stream to process the current data. (For example, using the next key frame to calculate a delta frame.)
- LTC
- Linear Timecode (formerly known as Longitudinal Timecode). Timecode is stored on a separate audio track and is one video frame time in duration.