compressionkit E2A2 codec, redistributed from danjacobellis/E2A2 with the author's permission
4e60ba0 | {"spec": "e2a2 stream layout v1 over [GGDLPC v1: unified coder (one learned causal FIR predictor per channel with arithmetic-mean fallback; one stateless pooled statistic: mean of the causal template abs differences and the last 16 coded abs residuals in scan order; two per-channel affine laws -> analytic folded GGD conditionals on the tau=2^(1/4) scale grid; canonical Huffman tables under the derived quotient split, <= 63 windowed hi values + escape at any bit depth; derived zero-run mode with elementary Golomb codes and exclusion tables, always available); inputs in [-N, N], N <= 65536; one call = one byte-padded bitstream, channel prefixes are literal bit prefixes]: two_stream = global[first scale group, whole plane, one pad] + per-macroregion detail streams (scale groups >= 1, coarse-to-fine, channel-major, one pad per region); all_detail = NO global stream, every channel per macroregion, each region decodable from its own bytes alone; one GGDLPC channel record per latent channel (global index); op-point streams are literal bit-prefixes", "version": 5, "stream_mode": "all_detail", "rank": 1, "macroregion": 16384, "N": 31, "scale_groups": [[256, 0, 9], [128, 9, 15], [64, 15, 21], [32, 21, 33], [16, 33, 42], [8, 42, 51]], "channels": [{"channel": 0, "mu": 0.0009475211584750369, "a": 0.7919216272631183, "b": 0.19308338685245932, "u": 1.3711469292912815, "v": 0.4888964900698879, "wq": [29, -8], "bq": 0, "n_samples": 824256}, {"channel": 1, "mu": -0.0009329625747340633, "a": 0.7808297535883856, "b": 0.1261926893643392, "u": 1.3143493471673544, "v": 0.3909712431126057, "wq": [-10, 0], "bq": 0, "n_samples": 824256}, {"channel": 2, "mu": -0.008027845717835236, "a": 0.7797044347826613, "b": 0.27151244807497305, "u": 1.322010886990791, "v": 0.5589627660931036, "wq": [-67, -3], "bq": 0, "n_samples": 824256}, {"channel": 3, "mu": -0.028491148381085487, "a": 0.7071405586850602, "b": 0.27725181984432434, "u": 1.2765628566952136, "v": 0.4909377727960215, "wq": [-167, 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