{'fraction_non_alphanumeric': 0.0264797507788162, 'fraction_numerical': 0.0, 'mean_word_length': 5.561224489795919, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
A single chip speech codec and filter

A simplified combination speech codec (coder/ decoder) and filter structure is described. It uses adaptive delta modulation followed by digital processing to produce a filtered log-PCM representation of a speech signal. The simplification results from combining the delta modulation step-size expansion, integration and low-pass filtering into one operation. All multiplications are eliminated and replaced by one-bit shift-and-add operations. The resulting structure is amenable to a single chip implementation using conventional, all-digital technologies while satisfying established filter standards.