Involving Transform Coding, E.g., Using Discrete Cosine Transform (dct) (epo) Patents (Class 375/E7.226)
- Adaptive scanning order of DCT coefficients, e.g., alternate scanning (EPO) (Class 375/E7.23)
- Involving variable length or entropy coding, e.g., Huffmann or arithmetic coding (EPO) (Class 375/E7.231)
- Quantization, normalization or weighting techniques therefor, e.g., normalization parameters or matrices, variable uniform quantizes, weighting matrices (EPO) (Class 375/E7.232)
- The output data rate being minimized down to or below the channel capacity (EPO) (Class 375/E7.233)
- With feedback control only of the data rate, e.g., buffer fullness being used (EPO) (Class 375/E7.234)
- With feedforward control only of the data rate, e.g., information amount estimator or sorter being used (EPO) (Class 375/E7.235)
- With feedforward and feedback control of the data rate (EPO) (Class 375/E7.236)
- With iterative control of the data rate (EPO) (Class 375/E7.237)
- The output quality being above a minimum (EPO) (Class 375/E7.238)