{ "ok": true, "mode": "JS8", "tool": "webftr-js8-frame-recover", "tool_version": "step42-direct-primary-bounded-repair", "input_wav": "/decoders/js8_decoder/runtime/quick_prefilter_windows/js8_quick_selected_window.wav", "rx_only": true, "safety": { "tx": false, "ptt": false, "tune": false, "send": false, "js8call_runtime_control": false }, "implementation_stage": "step42_frame_recovery_guard_no_message_unpack", "wav": { "sample_rate": 12000, "duration_seconds": 60.0, "frames": 720000, "rms_dbfs": -9.127580437334753, "peak_dbfs": -0.7246929351669301, "clipped": false }, "frame_requirements": { "expected_bits": 174, "expected_data_symbols": 58, "leading_costas_symbols": 7, "minimum_symbols_for_174bit_candidate": 65, "full_ft8_like_symbols_reference": 79 }, "profile_scan": { "ok": true, "mode": "JS8", "tool": "webftr-js8-profile-scan", "tool_version": "step42-direct-primary-bounded-repair", "input_wav": "/decoders/js8_decoder/runtime/quick_prefilter_windows/js8_quick_selected_window.wav", "rx_only": true, "safety": { "tx": false, "ptt": false, "tune": false, "send": false, "js8call_runtime_control": false }, "implementation_stage": "step42_fast_profile_scan_guard_no_message_unpack", "wav": { "sample_rate": 12000, "duration_seconds": 60.0, "frames": 720000 }, "profile_count": 6, "scan_limits": { "max_seconds": 60.0, "max_starts": 14, "max_base_candidates": 8, "deep": true }, "profiles": [ { "profile": "js8_near_6000", "nsps": 6000, "symbol_duration_seconds": 0.5, "tone_spacing_hz": 2.0, "note": "0.500 s timing guard candidate", "ok": true, "sync": { "start_seconds": 8.25, "base_freq_hz": 1010.0, "candidate_score": 49.22, "costas_hits": 4, "avg_margin_db": 3.86, "candidate_count": 12 }, "frame": { "symbols_available_after_start": 103, "data_symbol_count_estimate": 58, "expected_data_symbols_candidate": 58 }, "fec": { "soft_bit_count_estimate": 174, "missing_soft_bits_estimate": 0, "complete_ldpc_input_candidate_estimate": true }, "rank_score": 231.861 }, { "profile": "ft8_like_fast_1920", "nsps": 1920, "symbol_duration_seconds": 0.16, "tone_spacing_hz": 6.25, "note": "0.160 s symbols, 6.25 Hz spacing candidate", "ok": true, "sync": { "start_seconds": 29.68, "base_freq_hz": 980.0, "candidate_score": 47.58, "costas_hits": 3, "avg_margin_db": 5.94, "candidate_count": 12 }, "frame": { "symbols_available_after_start": 189, "data_symbol_count_estimate": 58, "expected_data_symbols_candidate": 58 }, "fec": { "soft_bit_count_estimate": 174, "missing_soft_bits_estimate": 0, "complete_ldpc_input_candidate_estimate": true }, "rank_score": 228.079 }, { "profile": "js8_normal_6192", "nsps": 6192, "symbol_duration_seconds": 0.516, "tone_spacing_hz": 1.937984, "note": "0.516 s symbols, 1.938 Hz spacing candidate used in earlier lab steps", "ok": true, "sync": { "start_seconds": 33.024, "base_freq_hz": 1020.0, "candidate_score": 46.67, "costas_hits": 3, "avg_margin_db": 3.13, "candidate_count": 12 }, "frame": { "symbols_available_after_start": 52, "data_symbol_count_estimate": 45, "expected_data_symbols_candidate": 58 }, "fec": { "soft_bit_count_estimate": 135, "missing_soft_bits_estimate": 39, "complete_ldpc_input_candidate_estimate": false }, "rank_score": 154.466948 }, { "profile": "mid_3840", "nsps": 3840, "symbol_duration_seconds": 0.32, "tone_spacing_hz": 3.125, "note": "0.320 s symbols, 3.125 Hz spacing candidate", "ok": true, "sync": { "start_seconds": 45.76, "base_freq_hz": 1005.0, "candidate_score": 44.86, "costas_hits": 2, "avg_margin_db": 5.02, "candidate_count": 12 }, "frame": { "symbols_available_after_start": 44, "data_symbol_count_estimate": 37, "expected_data_symbols_candidate": 58 }, "fec": { "soft_bit_count_estimate": 111, "missing_soft_bits_estimate": 63, "complete_ldpc_input_candidate_estimate": false }, "rank_score": 131.754724 }, { "profile": "js8_near_6400", "nsps": 6400, "symbol_duration_seconds": 0.533333, "tone_spacing_hz": 1.875, "note": "0.533 s timing guard candidate", "ok": true, "sync": { "start_seconds": 45.466667, "base_freq_hz": 1000.0, "candidate_score": 40.55, "costas_hits": 2, "avg_margin_db": 8.4, "candidate_count": 12 }, "frame": { "symbols_available_after_start": 27, "data_symbol_count_estimate": 20, "expected_data_symbols_candidate": 58 }, "fec": { "soft_bit_count_estimate": 60, "missing_soft_bits_estimate": 114, "complete_ldpc_input_candidate_estimate": false }, "rank_score": 95.03181 }, { "profile": "slow_7680", "nsps": 7680, "symbol_duration_seconds": 0.64, "tone_spacing_hz": 1.5625, "note": "0.640 s symbols, 1.5625 Hz spacing candidate", "ok": true, "sync": { "start_seconds": 52.0, "base_freq_hz": 1017.5, "candidate_score": 46.55, "costas_hits": 4, "avg_margin_db": 1.01, "candidate_count": 12 }, "frame": { "symbols_available_after_start": 12, "data_symbol_count_estimate": 5, "expected_data_symbols_candidate": 58 }, "fec": { "soft_bit_count_estimate": 15, "missing_soft_bits_estimate": 159, "complete_ldpc_input_candidate_estimate": false }, "rank_score": 64.462328 } ], "selected_profile": { "profile": "js8_near_6000", "nsps": 6000, "rank_score": 231.861, "complete_ldpc_input_candidate_estimate": true, "soft_bit_count_estimate": 174, "missing_soft_bits_estimate": 0 }, "decodes": [], "warnings": [ "Step 42 selects the best timing/profile candidate only. It still does not decode final JS8 text." ], "next_action": "Run auto-ldpc-probe on the same WAV so the selected timing profile is fed into the LDPC probe harness." }, "profile_guards": [ { "profile": "js8_near_6000", "nsps": 6000, "protocol_family": "js8_normal_candidate", "symbol_duration_seconds": 0.5, "tone_spacing_hz": 2.0, "sync": { "start_seconds": 8.25, "base_freq_hz": 1010.0, "candidate_score": 49.22, "costas_hits": 4, "avg_margin_db": 3.86, "candidate_count": 12 }, "frame": { "symbols_available_after_start": 103, "data_symbol_count_estimate": 58, "expected_data_symbols_candidate": 58 }, "fec": { "soft_bit_count_estimate": 174, "missing_soft_bits_estimate": 0, "complete_ldpc_input_candidate_estimate": true }, "rank_score": 231.861, "guard_score": 306.861, "available_after_start_seconds": 51.75, "minimum_symbols_for_174bit_candidate": 65, "minimum_seconds_after_start_for_174bit_candidate": 32.5, "missing_seconds_for_174bit_candidate": 0.0, "full_frame_symbols_reference": 79, "missing_seconds_for_full_ft8_like_frame": 0.0, "soft_bit_count_estimate": 174, "missing_soft_bits_estimate": 0, "enough_audio_for_174bit_candidate": true, "enough_audio_for_full_frame_reference": true, "guard_note": "Protocol-realistic JS8 timing candidate." }, { "profile": "ft8_like_fast_1920", "nsps": 1920, "protocol_family": "fast_diagnostic_candidate", "symbol_duration_seconds": 0.16, "tone_spacing_hz": 6.25, "sync": { "start_seconds": 29.68, "base_freq_hz": 980.0, "candidate_score": 47.58, "costas_hits": 3, "avg_margin_db": 5.94, "candidate_count": 12 }, "frame": { "symbols_available_after_start": 189, "data_symbol_count_estimate": 58, "expected_data_symbols_candidate": 58 }, "fec": { "soft_bit_count_estimate": 174, "missing_soft_bits_estimate": 0, "complete_ldpc_input_candidate_estimate": true }, "rank_score": 228.079, "guard_score": 230.079, "available_after_start_seconds": 30.32, "minimum_symbols_for_174bit_candidate": 65, "minimum_seconds_after_start_for_174bit_candidate": 10.4, "missing_seconds_for_174bit_candidate": 0.0, "full_frame_symbols_reference": 79, "missing_seconds_for_full_ft8_like_frame": 0.0, "soft_bit_count_estimate": 174, "missing_soft_bits_estimate": 0, "enough_audio_for_174bit_candidate": true, "enough_audio_for_full_frame_reference": true, "guard_note": "Diagnostic timing candidate. A short WAV can make this look better than real JS8 timing." }, { "profile": "js8_normal_6192", "nsps": 6192, "protocol_family": "js8_normal_candidate", "symbol_duration_seconds": 0.516, "tone_spacing_hz": 1.937984, "sync": { "start_seconds": 33.024, "base_freq_hz": 1020.0, "candidate_score": 46.67, "costas_hits": 3, "avg_margin_db": 3.13, "candidate_count": 12 }, "frame": { "symbols_available_after_start": 52, "data_symbol_count_estimate": 45, "expected_data_symbols_candidate": 58 }, "fec": { "soft_bit_count_estimate": 135, "missing_soft_bits_estimate": 39, "complete_ldpc_input_candidate_estimate": false }, "rank_score": 154.466948, "guard_score": 209.61481, "available_after_start_seconds": 26.976, "minimum_symbols_for_174bit_candidate": 65, "minimum_seconds_after_start_for_174bit_candidate": 33.54, "missing_seconds_for_174bit_candidate": 6.564, "full_frame_symbols_reference": 79, "missing_seconds_for_full_ft8_like_frame": 13.788, "soft_bit_count_estimate": 135, "missing_soft_bits_estimate": 39, "enough_audio_for_174bit_candidate": false, "enough_audio_for_full_frame_reference": false, "guard_note": "Protocol-realistic JS8 timing candidate." }, { "profile": "mid_3840", "nsps": 3840, "protocol_family": "mid_speed_diagnostic_candidate", "symbol_duration_seconds": 0.32, "tone_spacing_hz": 3.125, "sync": { "start_seconds": 45.76, "base_freq_hz": 1005.0, "candidate_score": 44.86, "costas_hits": 2, "avg_margin_db": 5.02, "candidate_count": 12 }, "frame": { "symbols_available_after_start": 44, "data_symbol_count_estimate": 37, "expected_data_symbols_candidate": 58 }, "fec": { "soft_bit_count_estimate": 111, "missing_soft_bits_estimate": 63, "complete_ldpc_input_candidate_estimate": false }, "rank_score": 131.754724, "guard_score": 119.772655, "available_after_start_seconds": 14.24, "minimum_symbols_for_174bit_candidate": 65, "minimum_seconds_after_start_for_174bit_candidate": 20.8, "missing_seconds_for_174bit_candidate": 6.56, "full_frame_symbols_reference": 79, "missing_seconds_for_full_ft8_like_frame": 11.04, "soft_bit_count_estimate": 111, "missing_soft_bits_estimate": 63, "enough_audio_for_174bit_candidate": false, "enough_audio_for_full_frame_reference": false, "guard_note": "Diagnostic timing candidate. A short WAV can make this look better than real JS8 timing." }, { "profile": "js8_near_6400", "nsps": 6400, "protocol_family": "js8_normal_candidate", "symbol_duration_seconds": 0.533333, "tone_spacing_hz": 1.875, "sync": { "start_seconds": 45.466667, "base_freq_hz": 1000.0, "candidate_score": 40.55, "costas_hits": 2, "avg_margin_db": 8.4, "candidate_count": 12 }, "frame": { "symbols_available_after_start": 27, "data_symbol_count_estimate": 20, "expected_data_symbols_candidate": 58 }, "fec": { "soft_bit_count_estimate": 60, "missing_soft_bits_estimate": 114, "complete_ldpc_input_candidate_estimate": false }, "rank_score": 95.03181, "guard_score": 110.10997, "available_after_start_seconds": 14.533333, "minimum_symbols_for_174bit_candidate": 65, "minimum_seconds_after_start_for_174bit_candidate": 34.666667, "missing_seconds_for_174bit_candidate": 20.133334, "full_frame_symbols_reference": 79, "missing_seconds_for_full_ft8_like_frame": 27.6, "soft_bit_count_estimate": 60, "missing_soft_bits_estimate": 114, "enough_audio_for_174bit_candidate": false, "enough_audio_for_full_frame_reference": false, "guard_note": "Protocol-realistic JS8 timing candidate." }, { "profile": "slow_7680", "nsps": 7680, "protocol_family": "slow_diagnostic_candidate", "symbol_duration_seconds": 0.64, "tone_spacing_hz": 1.5625, "sync": { "start_seconds": 52.0, "base_freq_hz": 1017.5, "candidate_score": 46.55, "costas_hits": 4, "avg_margin_db": 1.01, "candidate_count": 12 }, "frame": { "symbols_available_after_start": 12, "data_symbol_count_estimate": 5, "expected_data_symbols_candidate": 58 }, "fec": { "soft_bit_count_estimate": 15, "missing_soft_bits_estimate": 159, "complete_ldpc_input_candidate_estimate": false }, "rank_score": 64.462328, "guard_score": -28.151465, "available_after_start_seconds": 8.0, "minimum_symbols_for_174bit_candidate": 65, "minimum_seconds_after_start_for_174bit_candidate": 41.6, "missing_seconds_for_174bit_candidate": 33.6, "full_frame_symbols_reference": 79, "missing_seconds_for_full_ft8_like_frame": 42.56, "soft_bit_count_estimate": 15, "missing_soft_bits_estimate": 159, "enough_audio_for_174bit_candidate": false, "enough_audio_for_full_frame_reference": false, "guard_note": "Diagnostic timing candidate. A short WAV can make this look better than real JS8 timing." } ], "selected_guard_profile": { "profile": "js8_near_6000", "nsps": 6000, "protocol_family": "js8_normal_candidate", "symbol_duration_seconds": 0.5, "tone_spacing_hz": 2.0, "sync": { "start_seconds": 8.25, "base_freq_hz": 1010.0, "candidate_score": 49.22, "costas_hits": 4, "avg_margin_db": 3.86, "candidate_count": 12 }, "frame": { "symbols_available_after_start": 103, "data_symbol_count_estimate": 58, "expected_data_symbols_candidate": 58 }, "fec": { "soft_bit_count_estimate": 174, "missing_soft_bits_estimate": 0, "complete_ldpc_input_candidate_estimate": true }, "rank_score": 231.861, "guard_score": 306.861, "available_after_start_seconds": 51.75, "minimum_symbols_for_174bit_candidate": 65, "minimum_seconds_after_start_for_174bit_candidate": 32.5, "missing_seconds_for_174bit_candidate": 0.0, "full_frame_symbols_reference": 79, "missing_seconds_for_full_ft8_like_frame": 0.0, "soft_bit_count_estimate": 174, "missing_soft_bits_estimate": 0, "enough_audio_for_174bit_candidate": true, "enough_audio_for_full_frame_reference": true, "guard_note": "Protocol-realistic JS8 timing candidate." }, "selected_ldpc_probe": { "ok": true, "sync_candidate": { "start_sample": 99000, "start_seconds": 8.25, "base_freq_hz": 1010.0, "tone_spacing_hz": 2.0, "nsps": 6000, "candidate_score": 49.22, "costas_hits": 4, "avg_margin_db": 3.86 }, "frame_candidate": { "input_symbol_count": 96, "excluded_costas_symbol_count": 0, "detected_costas_blocks": [], "data_symbol_count_available": 96, "data_symbol_count_used": 58, "expected_data_symbols_candidate": 58, "costas_policy": "js8_leading_only" }, "fec_input_summary": { "soft_bit_count": 174, "missing_soft_bits": 0, "complete_ldpc_input_candidate": true, "llr_convention": "positive=bit0_more_likely, negative=bit1_more_likely, MSB-first candidate" }, "selected_variant": "reverse_full_bitstream", "ready_for_real_ldpc_matrix": true }, "decodes": [], "warnings": [ "Step 42 selects the best timing/profile candidate only. It still does not decode final JS8 text.", "Step 42 is still RX-only and diagnostic: it guards profile selection and frame length before final LDPC/message work." ], "next_action": "If selected_guard_profile.enough_audio_for_174bit_candidate is false, make a longer WAV capture. If true, the next lab step can move to real LDPC/FEC matrix integration and JS8 message unpacking." }