Patent ID: 7643448

Claim:
An apparatus comprising a radio transmitter device in which data indicating a transport format combination is coded and combined with content data for incorporation in a radio packet, the apparatus comprising: a controller, a memory, and a program stored in the memory, wherein the controller is configured on the basis of the program: to store plural codes as a set of codes, each of said plural codes in said set of codes relating to and identifying respective corresponding transport format combination data to each of said plural codes in said set of codes having more bits than said corresponding transport format combination data, wherein each code in said set of codes is constituted by a first number of bits and wherein each code in said set of codes has the same number of bits as each other code in said set of codes: to operate in a full-rate channel mode, and to include in a radio packet when operating in the full-rate channel mode all of the first number of bits comprising one of said plural codes, and to operate in a second mode in which data is transmitted on a channel at a transmission rate that is lower than a transmission rate of the full-rate channel mode, and to include in a radio packet when operating in the second mode, a part of one of said codes, wherein said part of said one of said codes comprises a second number of bits, wherein the second number of bits is less than the first number of bits, and to refrain from transmitting bits of the said one of said plural codes other than said first number of bits comprising one of said plural codes.