New in AWT2 0.09.04 version:
– bugfix in the encoder: noise generation feature (“-noise_level” command line parameter) was ignoring “-skip_first” and “-skip_last” settings; fixed.
– improvement in the encoder: “-skip_last” value can be negative, in this case the parameter specifies duration of audio to be watermarked (all the rest is skipped and not watermarked)
Full changes log is available here.
AWT2 free evaluation package is available here.… >>> Click to read the full post...
Sometimes you may need to be able analyzing live audio stream using AWT2 watermark decoder. Here is an efficient recipe on establishing live analysis of audio stream from sound card (mic or line-in) using all freeware tools on Microsoft Windows machine.
Tools involved:
Create a folder, extract SoX and Blat packages into it. Put AWT2 … >>> Click to read the full post...
The new AWT2 0.09.00 is a major AWT2 release. Here is what’s new:
– AWT2 encoder uses new, redesigned encoding algorithm (backward compatible with the older one). The new algorithm features new “-modulation_gain” parameter that triggers an additional modulation mechanism of the encoder aimed to increase watermark robustness. With default setting (0 dB) the modulation of the signal is not performed. Lower values (e.g. -6 dB) enable special modulation of sub-band signals that helps the watermarks to withstand audio transformations … >>> Click to read the full post...
Updated AWT1 package with critical fix in GUI.
What’s new:
Audio Watermarking Tools 1 (AWT1) is another product that is now offered at AudioWatermarking.info. AWT1 is a watermarking solution realizing so called “strict watermarking” approach in the sense that the source (not watermarked) audio data is required in order to find and decode watermark in the watermarked recording. In other words, watermark extraction is performed by “comparing” source and watermarked streams.
Both AWT1 and AWT2 are based on the same very basic patented approach, but use it in two different … >>> Click to read the full post...
AWT2 0.08.20 has been released, which is a major release of the software. It brings several significant improvements. Here is a full change log:
encoder:
– significantly improved encoding speed (2 times faster in ‘normal capacity’ mode @ 44.1 KHz)
– lower RAM consumption
– reduced cache file size
– significantly smaller binaries
decoder:
– significantly improved watermark search speed (from 3 to 5 times faster); files with no watermarks are now detected quickly.
– improved watermark detection accuracy (including … >>> Click to read the full post...
The author of AWT2 has been granted a U.S. Patent No. 8,116,514 for the watermarking technology behind this product.… >>> Click to read the full post...
New AWT2 0.08.15 brings improved SDK and some internal code clean up.… >>> Click to read the full post...
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.… >>> Click to read the full post...
