{'fraction_non_alphanumeric': 0.023676880222841225, 'fraction_numerical': 0.01532033426183844, 'mean_word_length': 4.798387096774194, '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}}
Fast Intra Mode Decision for HEVC

For the higher coding performance than the previous video coding standards, High-Efficiency Video Coding (HEVC) adopts an intra prediction method with 35 modes, which requires heavy computational complexity. Intending to reduce this complexity, we analyzed the role of modes and proposed a scheme that contains two rough mode decision (RMD) processes with a customized set of modes to be tested in the first stage. The second stage of the RMD is calculated for a maximum of 4 modes. As compared to the default encoding scheme in HEVC test model HM-16.20, experimental results show that the proposed method reduces encoding time up to 22.74% with negligible loss of coding efficiency.