Lines Matching refs:DCT

24   A "coefficient" is a frequency coefficient (a DCT transform output number).
48 sequential, and progressive DCT processes.  Hierarchical processes are not
107     * MCU assembly, DCT, quantization.
120     * Dequantization, inverse DCT, MCU disassembly.
292                   |                            |-- Forward DCT, quantize
329 * Coefficient controller: buffer controller for the DCT-coefficient data.
330   This controller handles MCU assembly, including insertion of dummy DCT
337 * Forward DCT and quantization: Perform DCT, quantize, and emit coefficients.
338   Works on one or more DCT blocks at a time.  (Note: the coefficients are now
345   For progressive JPEG, the same DCT blocks are fed to the entropy coder
393                   |                            |-- Dequantize, Inverse DCT
411 * Coefficient controller: buffer controller for the DCT-coefficient data.
413   DCT blocks at the right or bottom edge.  When reading a multiscan JPEG
415   (Buffering DCT coefficients, rather than samples, is necessary to support
426 * Dequantization and inverse DCT: like it says.  Note that the coefficients
428   merge dequantization and inverse DCT into a single step for speed reasons.
429   When scaled-down output is asked for, simplified DCT algorithms may be used
430   that emit fewer samples per DCT block, not the full 8x8.  Works on one DCT
439   general output rescaling, too.  Note that if undersized DCT outputs have
440   been emitted by the DCT module, this module must adjust so that properly
500    coefficient controller's DCT coefficient buffer.  Note that this
503 2. Data output reads from the DCT coefficient buffer and performs the IDCT
558 subtracting 128 from the sample value in the DCT step.  Similarly, during
603 Arrays of DCT-coefficient values use the following data structure:
622 contain quantized coefficients everywhere outside the DCT/IDCT subsystems.