Concealment methods based on kalman filter
Hirohito Suda, Takahiro Hosokawa, Hideki Imai · Electronics and Communications in Japan (Part I Communications) · 1986
Abstract When an analog waveform is digitized and transmitted over a digital channel, a combination of an error‐correction technique and a concealment method is often employed to improve the quality of the communication system. New concealment methods based on the Kalman filter are Kalman filtering concealment (KFC), scalar‐approximation concealment (SAC) and symbol states estimating concealment (SSEC). It is shown by simulation that these three methods provide better performance than conventional methods. The use of redundancy in the error‐correcting codes and the statistics of the analog information source is the core concept of the new concealment methods. In particular, the SSEC method is shown to be superior to other methods in its effective realization of this concept.