Terms & Glossary for Audio & Video
- Acoustic Treatment – Materials and techniques used to control sound reflections and improve audio clarity in a space.
- Amplifier (Amp) – A device that increases the power of an audio signal to drive speakers or headphones.
- Aspect Ratio – The proportional relationship between the width and height of a video frame (e.g., 16:9 for widescreen).
- Balanced Audio – A method of transmitting audio signals with reduced noise using three conductors (positive, negative, and ground).
- Bitrate – The amount of data processed per second in audio or video, measured in kbps (audio) or Mbps (video), affecting quality.
- Codec – A technology for compressing and decompressing audio or video files (e.g., MP3, AAC, H.264, HEVC).
- Compression – The process of reducing the size of an audio or video file while maintaining acceptable quality.
- Decibel (dB) – A unit of measurement for audio loudness or signal strength.
- Dolby Atmos – An advanced surround sound technology that creates a three-dimensional audio experience.
- DSP (Digital Signal Processing) – The manipulation of audio signals using digital techniques for effects, equalization, and noise reduction.
- Dynamic Range – The difference between the quietest and loudest parts of an audio or video signal.
- EQ (Equalization) – Adjusting the balance of different frequency components in an audio signal.
- Frame Rate (FPS) – The number of video frames displayed per second (e.g., 24fps, 30fps, 60fps).
- HDMI (High-Definition Multimedia Interface) – A digital connection standard for transmitting high-quality audio and video.
- Latency – The delay between an audio or video signal being sent and received, affecting synchronization.
- Lossless Audio – Audio formats that retain all original data without compression loss (e.g., FLAC, ALAC).
- Loudness Normalization – A process ensuring consistent audio levels across different media sources.
- Microphone Polar Pattern – The directional sensitivity of a microphone, including cardioid, omnidirectional, and bidirectional.
- Mixing – The process of blending multiple audio tracks into a final output.
- Noise Floor – The background noise level in an audio system.
- Pixel Density (PPI/DPI) – The number of pixels per inch in a display, affecting sharpness.
- Post-Production – Editing and enhancing audio or video after recording, including color correction, effects, and mastering.
- Resolution – The number of pixels in a video display, such as 1080p (Full HD) or 4K (Ultra HD).
- Sampling Rate – The number of times per second an audio signal is digitally captured, measured in Hz (e.g., 44.1kHz, 48kHz).
- Soundstage – The perceived spatial placement of sound elements in an audio mix.
- Streaming – Real-time transmission of audio or video over the internet without downloading the entire file.
- Subwoofer – A speaker designed to reproduce low-frequency (bass) sounds.
- Surround Sound – An audio system using multiple speakers to create an immersive sound experience (e.g., 5.1, 7.1, Dolby Atmos).
- Timbre – The unique tone quality of a sound that distinguishes different instruments or voices.
- Waveform – A graphical representation of an audio signal’s amplitude over time.
This glossary covers fundamental audio and video terms to help understand sound and visual production, playback, and processing.