Patent ID: 8917779

Claim:
An electrocardiogram signal compression system includes: a normalization device for receiving N electrocardiogram signals and performing a normalization operation on the N electrocardiogram signals to generate N normalized signals, where N is a positive integer; a discrete cosine transform device connected to the normalization device for receiving the N normalized signals and performing a discrete cosine operation to generate N discrete cosine signals; an absolute value and quantization device connected to the discrete cosine transform device for receiving the N discrete cosine signals and performing an absolute value operation and a quantization operation to generate N quantized amplitude signals; a difference coding device connected to the absolute value and quantization device for receiving the N quantized amplitude signals and performing differential pulse code modulation (DPCM) on the N quantized amplitude signals to generate N difference signals; a first variable length coding device connected to the difference coding device for performing a first variable length coding operation on the N difference signals to generate a first data stream; a sign and difference device connected to the discrete cosine transform device for receiving the N discrete cosine signals and recoding signs of the N discrete cosine signals, so as to generate three sign signals; a second variable length coding device connected to the sign and difference device for performing a second variable length coding operation on the three sign signals to generate a second data stream; and a mixer connected to the first variable length coding device and the second variable length coding device for mixing the first data stream and the second data stream to generate a compressed electrocardiogram data stream.