AudioWatermarking.info blog

The author of AWT2 has been granted a U.S. Patent No. 8,116,514 for the watermarking technology behind this product.

New AWT2 0.08.15 brings improved SDK and some internal code clean up.

AWT2 encoder is now available in a form of client-server application, upon request. Client’s encoder performs all the heavy DSP as usual, but it requires receiving a special “key” for each unique watermark payload from the server side. This feature allows establishing server-controlled watermarking services.

The new version fixes a bug in encoder which could cause sudden crash.

The new version brings improved handling of non-standard wave files. In particular, waves created in Pro Tools with non-standard chunks in the RIFF header are now accepted by AWT2.

AWT2  version 0.08.11 brings new features and improvements.

- added -fast_tempo_only and -slow_tempo_only parameters allowing to speed up synchronization stage of watermark decoding  process by limiting time-stretched audio analysis to analysis of increased/decreased audio playback speed only
- added -fast_calcs parameter forcing the decoder to perform simpler and thus faster calculations at expense of some very moderate loss of reliability
- in AWT2 SDK – added in-memory watermark encoding/decoding functions
- fixed a bug that could cause crash in decoder
- fixed memory leakage in decoder

New AWT2 release offers new -slice_length & -slice_step feature that allows analyzing (decoding) long audio recordings by slices. It is especially useful for watermarks search in recordings of broadcasts in which not the whole recording is watermarked, but only parts of it (e.g. particular songs in radio broadcast). AWT2 User Guide contains detailed explanation of the feature and provides examples.

AWT2 version 0.08.9 brings full support of multichannel wave files (3, 4, 5, …, 12 channels are no problem now).

Additionally, several unpleasant bugs were fixed in GUI tool for Windows, Linux and Mac OS as well as in command line tools. In particular, the tools were not able to operate with file paths containing spaces. Now it should be OK under any OS.

FFmpeg static binary has been added into Mac OS package for more convenience.

AWT2 0.08.8 has been published today. The new version brings significantly improved support for wave (.wav) files of different types. In particular, WAVE_FORMAT_EXTENSIBLE waves are now fully supported. AWT2 now supports any files sampled at 192000, 176400, 96000, 88200, 48000, 44100, 32000, 22050, 16000, 11025, 8000 Hz, signed 16-/24-/32-bit little-endian PCM or unsigned 8-bit PCM, 32-/64-bit IEEE float, mono or stereo.

The new version is available at the main page: http://audiowatermarking.info.

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