Telemetry encoding technique for smart stylus

Abstract

The invention relates to the transmission of telemetry data from a stylus to a host computer via a serial, asynchronous data channel. The telemetry data is encoded into code-words using a specially selected error detecting or error correcting code, the code-words are transmitted from the stylus in a continuous, homogeneous data stream without the use of framing delimiters between adjacent code-words, and the code-words are then received by the host computer which separates the code-words according to the unique characteristics of the selected code. The code may be chosen based on both the error detection/correction requirements of the system and the probability that the code will create invalid intermediate code matches between consecutive back-to-back code-words. In one embodiment, the invention provides a synchronization scheme which greatly reduces the probability that invalid intermediate code matches will be recognized in the host computer as validly transmitted code-words.

Dependencies are inferred from the claim text.