SCALING IN PERCEPTUAL IMAGE AND VIDEO CODING

Methods and devices for image and video coding. A block of N coefficients is defined as an input vector of N dimensions having a magnitude value and N−1 angle values. The encoder normalizes and quantizes the angle values to produce quantized angle values, reconstructs the angle values from the quantized angle values and determines a quantizer based on the reconstructed angle values. The determined quantizer is then used to quantize the magnitude value. The quantized angle values and the quantized magnitude value are entropy encoded. The decoder preforms the reverse process, and determines the quantizer for inverse quantizing the quantized magnitude value from the reconstructed angle values.