This is a filter that optimizes the signal-to-noise ratio of your playback, to remove sound distortion and make the overall sound 'cleaner'. This is usually an automated process built-in to the head unit's playback system.
removing unwanted noise from a signal. For video this is accomplished with filters such as blur, mean, or median. Uniform noise reduction applies one filter equally to each pixel. Adaptive noise reduction applies different filters to different kinds of noise.
The difference in sound level between the source (talker) and receiver (listener) locations in a room or between rooms. The NR is dependent on the distance between each, the absorptive materials in the space, and the intervening acoustical barriers such as furniture panels or wall partitions.
In acoustic echo cancellers (AECs), a type of filtering which reduces the amplitude of noise sources within a teleconference room transmitted to a distant conference room.
Process of reducing inherent audio system noises by the use of special electronic circuitry. See DOLBY.
Any active device to reduce or remove noise in an audio component or system.
Quite often noise in the picture is caused by a weak antenna signal or a bad video tape. Noise reduction makes the picture more clear.
Process of reducing background hiss and hum while preserving the desired sound on a recording.
Any technique for reducing the amount of undesired noise in an audio signal. Companding is one of several such techniques.
The difference between the average sound pressure levels of two spaces. Usually these two spaces are two adjacent rooms called, respectively, the source room and the receiving room.
The amount of noise that is reduced through the introduction of sound absorbing materials. The level (in decibels) of sound reduced on a logarithmic basis.
Systems for reducing background hiss in magnetic tape recording.
A "filter" used to reduce unwanted noise from video to audio signals. In video, noise is reduced by slightly blurring the picture. In audio, the filtering in more complex, but it can help remove unwanted hiss and pops.
Post production process that eliminates the bursts of interference that are not part of the audio and video signals.
Some cameras that offer long shutter speeds (exceeding 1 second) usually have a noise reduction (NR) feature that is either automatic or can be enabled in the menu. This is to help eliminate random "hot" pixels and other image noise.
An electronic process used to reduce noise levels in audio and video signals. In audio, the most effective systems employ an encode/decode scheme, performed before and after recording, such as the Dolby audio noise reduction system. Noise reduction can be performed on an existing audio signal using systems such as DNR (dynamic noise reduction) but are less effective because they also affect the audio signal. In video, the most effective noise reduction is accomplished by digitizing the video signal and carrying out a computerized pixel by pixel analysis of the data.
Effort to reduce noise in a system, typically in sound reproduction equipment and sound storage media such as audiocassette tapes, through various mechanical and software based methods (see Noise).
The use of a compressing or expanding device which reduces unwanted tape hiss (see Dolby).
The reduction of sound, expressed in dB, from one side of a barrier or material to the other.
System for reducing analogue tape noise or for reducing the level of hiss present in recording.
A blanket term to describe a variety of background-noise-suppressing systems, which are employed in audio and video sound systems.
A Noise Reducing Microphone is desirable fir a clearer recording of conversations and the prevention of noises, like the sound of paper rustling during meetings.
Noise reduction is the process of removing noise from a signal. Noise reduction techniques are conceptually very similar regardless of the signal being processed, however a priori knowledge of the characteristics of an expected signal can mean the implementations of these techniques vary greatly depending on the type of signal.