The Indeo-C was a compression algorithm in the Personal Conferencing Specification (PCS) from the Personal Conferencing Work Group (PCWG), which was an industry group led by Intel. Due to lacking support by the industry, the PCWG dropped the PCS, and has now consolidated with International Multimedia Teleconferencing Consortium (IMTC) which supports ITU-T Red. H.320 videoconferencing. The Indeo-C algorithm did not use vector quantizing, as in Indeo, or a hybrid wavelet-based algorithm, as in Indeo Video Interactive, but used a transform coding called Fast Slant Transform (FST). An FST calculates frequency coefficients of picture blocks, like the DCT used in MPEG, but requires less computational power. Both intra-frame and inter-frame coding with motion estimation was applied in Indeo-C and finally, run-length and Huffman coding.