subband encoder - définition. Qu'est-ce que subband encoder
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Qu'est-ce (qui) est subband encoder - définition

DEVICE THAT CONVERTS THE ANGULAR POSITION (MOTION) TO AN ANALOG OR DIGITAL CODE
Shaft encoder; Rotary sensor; Optical encoder; Absolute encoder; Motor encoder; Microgon; Encoder disc
  • A [[Gray code]] absolute rotary encoder with 13 tracks. At the top,  the housing, interrupter disk, and light source can be seen; at the bottom the sensing element and support components.
  • Conceptual drawing of a rotary incremental encoder sensor mechanism, with the corresponding logic states of the A and B signals
  • Two square waves in quadrature. The direction of rotation is indicated by the sign of the A-B phase angle which, in this case, is negative because A trails B.
  • An incremental encoder
  • Incremental encoder

Rotary encoder         
A rotary encoder, also called a shaft encoder, is an electro-mechanical device that converts the angular position or motion of a shaft or axle to analog or digital output signals.
subband encoding         
  • Sub-band coding and decoding signal flow diagram
Sub-band coder; Subband coding; Subband encoding; Sub-band; Subband
An audio compression technique where the sound is split into frequency bands and then parts of the signal which the ear cannot detect are removed, e.g. a quiet sound masked by a loud one. The remaining signal is encoded using variable bit-rates with more bits per sample being used in the mid frequency range. Subband encoding is used in MPEG-1. (1994-11-02)
Encoder (digital)         
  • The image represents a 8:3 encoder.
4-input OR gates have been used for simplicity; one can also use 3 2-input OR gates.
  • A simple 4:2 Encoder using OR gate.
  • A General encoder's block diagram.
ENCODER IN DIGITAL ELECTRONICS, A ONE-HOT TO BINARY CONVERTER
Simple encoder; Digital encoder
An encoder (or "simple encoder") in digital electronics is a one-hot to binary converter. That is, if there are 2n input lines, and at most only one of them will ever be high, the binary code of this 'hot' line is produced on the n-bit output lines.

Wikipédia

Rotary encoder

A rotary encoder, also called a shaft encoder, is an electro-mechanical device that converts the angular position or motion of a shaft or axle to analog or digital output signals.

There are two main types of rotary encoder: absolute and incremental. The output of an absolute encoder indicates the current shaft position, making it an angle transducer. The output of an incremental encoder provides information about the motion of the shaft, which typically is processed elsewhere into information such as position, speed and distance.

Rotary encoders are used in a wide range of applications that require monitoring or control, or both, of mechanical systems, including industrial controls, robotics, photographic lenses, computer input devices such as optomechanical mice and trackballs, controlled stress rheometers, and rotating radar platforms.