According to the practical application of cab signaling device on railway site,a loss-free compression method for the waveform data recorded by cab signaling recorder based on integer lifting wavelet transform and Rice coding is proposed in this paper.

According to the signal features of various automatic block systems, a signal singularity detection method based on the wavelet analysis technique is adopted in this paper to carry out singularity detection for the data recorded by the cab signaling recorder.

This method utilizes the mirror dmey wavelet filter group with excellent cutoff frequency performance to carry out three-level wavelet decomposition on the waveform recorded by the cab signaling recorder.