CODING DEVICE, CODING METHOD, DECODING DEVICE AND DECODING METHOD

PROBLEM TO BE SOLVED: To judge easily whether or not continuity among several files should be considered when the several files are coded or decoded. SOLUTION: A retrieval condition is set in a step S51 and a variable is initialized in a step S52. When it is determined that there is a file to be retrieved in a step S53, the file is opened in a step S55 and the front part data is read in a step S56. In a step S57 the condition of set threshold value is compared with the data read un. If the data read in is above the set threshold value, warning process is done in a step S58. In a step S59, S60 and S61 final part data is processed. In a step S62 the file is closed and in a step S63 i is incremented, returning to the step S53. Only the file that is given a warning is listened to and thus it is easy to judge whether or not the continuity should be considered.