Figure 6

Lossless and lossy reconstruction. Short segment of original (dashed line) and reconstructed signals (continuous line) for a) lossless JPEG and c) lossy JPEG. The reconstruction error for b) lossless JPEG is always zero, while for d) lossy JPEG, it depends on the chosen value for the quality parameter. (q = 13 in this figure). For the first 500 ms monopolar signal (shown on the figure), MAE was 45 A.U. and SNR was 19.22 dB, while for the whole set of 128 monopolar signals, MAE was 101 A.U. and mean SNR was 19.88 dB. The compression performance was given by a FSR of 90.64% for lossy JPEG and 33.52% for lossless JPEG.