This directory contains source image test data and reference test data referred to by ITU-T T.83 | ISO/IEC 10918-2, "Digital compression and coding of continuous-tone still images: Compliance testing". This data are used for compliance testing of proposed encoders and decoders. - Source image and reference test data of ITU-T T.83 | ISO/IEC 10918-2 - A8.SRC B8.SRC C8.SRC D8.SRC 8-bit Source image test data 8-bit lossless decoder reference data. A16.SRC B16.SRC C16.SRC D16.SRC 16-bit lossless decoder reference data, constructed from the 8-bit data. EREF_A8.DCT EREF_B8.DCT EREF_C8.DCT EREF_D8.DCT 8-bit Encoder reference test data (DCT-based processes). These files give the DCT coefficients for each 8-by-8 block from components A, B, C, D respectively, including blocks at the edges that were completed by extension. The coefficients are given as 16-bit integers in zig-zag order. DREF_A8.DCT DREF_B8.DCT DREF_C8.DCT DREF_D8.DCT 8-bit Decoder reference test data (DCT-based processes). Same format as the encoder reference test data described above. EREF_A12.DCT EREF_B12.DCT EREF_C12.DCT EREF_D12.DCT 12-bit Encoder reference test data (DCT-based processes). These files give the DCT coefficients for each 8-by-8 block from components A, B, C, D respectively, including blocks at the edges that were completed by extension. The coefficients are given as 16-bit integers in zig-zag order. DREF_A12.DCT DREF_B12.DCT DREF_C12.DCT DREF_D12.DCT 12-bit Decoder reference test data (DCT-based processes). Same format as the encoder reference test data described above. ------------------------------------------------------------------------ This data was generated and validated by the participants of the ISO/IEC JTC1/SC29/WG1 SG on JPEG. Many thanks to all those who contributed. This directory contains compressed test data streams for the generic decoder compliance tests defined in ITU-T T.83 | ISO/IEC 10918-2, "Information technology - Digital compression and coding of continuous-tone still images: Compliance testing". The table below summarizes the structure of the compressed test data streams. Refer to Annex C of ITU-T T.83 | ISO/IEC 10918-2 for a more detailed specification of the compressed test data streams. ----- Compressed test data streams of ITU-T T.83 | ISO/IEC 10918-2 ---- DATA JPEG Precision Entropy Code Nf Inter- DRI STREAM mode (bits) Coder Tables leave ----------------------------------------------------------------------- A1 S(B) 8 Huff sample 4 yes yes B1 abbr. - Huff sample - - - B2 S(B) 8 Huff custom 255 no yes C1 S(E) 8 Huff custom 4 yes yes C2 S(E) 8 Huff custom 4 no yes D1 S(E) 8 arith custom 4 yes yes D2 S(E) 8 arith custom 4 no yes E1 S(E) 12 Huff custom 4 yes yes E2 S(E) 12 Huff custom 4 no yes F1 S(E) 12 arith custom 4 yes yes F2 S(E) 12 arith custom 4 no yes G1 P(SS) 8 Huff custom 4 yes yes H1 P(SS) 8 arith custom 4 yes yes J1 P(SS) 12 arith custom 4 yes yes K1 P(Full) 8 Huff custom 4 yes yes L1 P(Full) 8 arith custom 4 yes yes N1 P(Full) 12 arith custom 4 yes yes O1 LL 8 Huff sample 4 yes yes O2 LL 16 Huff sample 4 no yes P1 LL 8 arith default 4 yes yes P2 LL 16 arith custom 4 no yes Compressed test data streams I1, M1, Q1, Q2, R1, R2, S1, S2, T1, and T2 are not available at this time. ----------------------------------------------------------------------- This data was generated and validated by the participants of the ISO/IEC JTC1/SC29/WG1 SG on JPEG. Many thanks to all those who contributed.