def METHOD_NAME(self):
    pair_table = []
    spk_paths = set()
    with open(self.meta_data, "r") as f:
        usage_list = f.readlines()
    for pair in usage_list:
        list_pair = pair.split()
        pair_1= os.path.join(self.root, list_pair[1])
        pair_2= os.path.join(self.root, list_pair[2])
        spk_paths.add(pair_1)
        spk_paths.add(pair_2)
        one_pair = [list_pair[0],pair_1,pair_2 ]
        pair_table.append(one_pair)
    return {
        "spk_paths": list(spk_paths),
        "total_spk_num": None,
        "pair_table": pair_table
    }