Release highlights
ld-decode revision 7
December 2022
- AC3 support! (special thanks to Staffan Ulfberg for figuring out the decoding and error correction, and Ian and Leighton Smallshire for the code here)
- Improved ld-analyze UI with more functionality, including a vectorscope
- cmake is now used, allowing builds on many more distributions
- Improvements to disk stacking
- Further improved EFM decoding with better filters and higher accuracy
- ld-process-efm is now a command line tool
- DTS decoding support
- Option for line-locked NTSC analog audio output
- Improved analog(ue) audio decoding quality (but CX still needs work)
- Lots (and lots and lots) of bug fixes
ld-decode revision 6
December 22nd 2019
- ld-decode processing speed greatly improved
- ld-decode and ld-decode tool multithreading support
- Direct support for compressed RF disc images in ld-decode
- Lots (and lots) of bug fixes
- Improved TBC
- NTSC Analog audio improvements
- PAL Analogue audio improvements
- PAL Transform chroma-decoder
- Many improvements to the chroma decoder
- New ld-analyse GUI with better UI and improved graphing
- Differential dropout detection
- Improved single-disc drop-out correction
- Greatly improved EFM decoding with better filters and higher accuracy
- Automatic disc mapping and metadata correction
- Improved wiki with more documentation
ld-decode revision 5
May 19th 2019
- Improved MTF handling in ld-decode
- EFM demodulation in ld-decode
- EFM digital audio decoding with JSON metadata production
- EFM data decoding (tested with Domesday LD-ROM discs) with JSON metadata production
- VITS (Vertical Interval Test Signal) metadata production in ld-decode
- VITS analysis in ld-analyse including SNR graph
- PAL and NTSC comb filter output dimensions now more ffmpeg friendly
- Support for keyboard shortcuts in ld-analyse
- Fixes (many!) to ld-decode and the tool-chain to improve both quality and robustness
- Drop-out correction support for NTSC discs with pull-down fields
- Improved ld-decode-tools MacOS support
ld-decode revision 4
January 28th 2019
Some of the many new features include:
- Accurate dropout detection in ld-decode using pre- and post-filtered decodes
- Improved dropout correction supporting inter-field replacement
- Intelligent line and sub-line video combination (combine video data from multiple disc sources)
- Improved NTSC 3D comb filter
- Improved YIQ to RGB colour-space conversion for NTSC
- Support for black and white only output from NTSC and PAL comb filters
- Capture quality metrics via VITS analysis
- CLV time code support in all post-processing tools
- Multiple improvements to both PAL and NTSC video and analogue audio decoding
- Improved VBI decoding now provides full IEC parameter support for both NTSC and PAL
- NTSC white-flag and 40-bit FM code decoding supported
- VBI auto-correction of time-code and frame number sequences as well as soundmode
- Analogue audio decoding improvements (better audio, more accurate timing)
- New JSON library for better handling of large JSON files (especially for more heavily damaged discs)
- Field order sequencing more robust with sync ‘confidence’ analysis
- Support for disc sources with reversed field order
- Support for non-standard discs with 90 degree colour burst offsets
- Support for NTSC and NTSC-J sources
- Termination and crash handling improved in ld-decode
- Multiple improvements to the ld-analyse GUI:
- Faster comb filter previews,
- Whole capture dropout analysis graphs,
- Scalable video preview
- Improved VBI analysis
- Improved dropout analysis
- Save frame preview as PNG
- Dropout highlighting in line trace oscilloscope
- …and many more minor fixes
Other notable dates
- June 20th 2017 - Domesday Duplicator 3_0 released
- May 29th 2017 - Domesday Duplicator 2_2 released
- December 14th 2017 - Domesday Duplicator 2_0 released
- October 30th 2017 - First sample published from the Duplicator
- September 11th 2017 - First collaboration suggestion between ld-decode and Domesday86
- January 3rd 2017 - Domesday86.com website launched
- September 2016 - Much discussion about the need for better capture
- May 13th 2015 - First PAL images produced
- January 4th 2014 - First combined TBC and NTSC comb-filter
- November 2nd 2013 - Analog audio decoding starts working
- July 21st 2013 - First ‘it’s a dumb idea’ response post
- April 30th 2013 - Project announced on lddb.com
- April 28th 2013 - Chad creates the ld-decode repo