| 摘要 |
PROBLEM TO BE SOLVED: To shorten the time needed for judging an information rate and to reduce power consumption by reducing the amount of processing for judging the information rate. SOLUTION: In this transmitter 1, the information rate to be used in the latest frame is set to either of the information rate used for the previous frame or the information rate different by one stage from the information rate used or the previous frame, and transmission data subjected to a convolution encoding processing in accordance with this information rate is transmitted. In this receiver 2, a candidate for the information rate being used for the received latest frame down is narrowed to a part of plural pieces of the information rate based on at least the information used in the previous frame, a specified judgment processing is performed by taking only the narrowed information rate as an object, and the information rate used in the latest frame, is judged, thereby deciding the reception data subjected to an decoding processing corresponding to this information rate as valid reception data. |
