Wide-band speech compression and decompression apparatus and method thereof

The present invention discloses a conventional standard narrow-band speech signal compression apparatus compatible with the available and low-compressed high-band using compressed information of a speech signal bandwidth that can be compressed and restoring it to the speech signal the speech signal and restoring apparatus and method . Wide-band speech signal compression apparatus in accordance with the present invention includes a narrow-band speech compressor, and a high-band speech compression unit. Narrow-band speech compressor compresses a low-band speech signal of the wide-band speech signal, and outputs the compressed low-band speech signal as a low-band speech packet. The high-band speech compression unit compressing a high-band speech signal of the wide-band speech signal using energy of a low-band signal provided from the narrow-band speech compressor, and outputs the compressed high-band speech signal as a high-band speech packet. Wide-band speech signal decompression device according to the invention includes a narrow-band speech decompressor, and a high-band speech decompressor, and an adder. The narrow-band speech decompressor group restoring the compressed low-band speech packet into a low-band speech signal. Restoring a high-band speech group to recover the high-band speech packet compressed by using the energy information of the low-band reconstructed signal provided from the narrow-band speech decompressor with the high-band speech signal. The adder outputs a wide-band reconstructed signal by adding the low-band speech signal and the high-band speech signal.