ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,424,215, issued on Sept. 23, was assigned to SoundHound AI IP LLC (Santa Clara, Calif.).

"Pre-wakeword speech processing with reverse automatic speech recognition" was invented by Karl Stahl (Boca Raton, Fla.) and Bernard Mont-Reynaud (Santa Clara, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods and systems for pre-wakeword speech processing are disclosed. Speech audio, comprising command speech spoken before a wakeword, may be stored in a buffer in oldest to newest order. Upon detection of the wakeword, reverse acoustic models and language models, such as reverse automatic speech recognition (R-ASR) can be applied to the buffered audio, ...