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An apparatus for encoding source data, that includes a first encoder configured to encode the source data to produce first additional data; and a randomizing unit configured to randomize the source data to produce randomized data; and a second encoder configured to encode the randomized data to prod

An apparatus for encoding source data, that includes a first encoder configured to encode the source data to produce first additional data; and a randomizing unit configured to randomize the source data to produce randomized data; and a second encoder configured to encode the randomized data to produce second additional data; and a selector configured to select a number of bits from the first and second additional data to produce first selected data and second selected data, wherein the number of selected bits is selected based upon a data length of an output sequence determined by a transmission frame format, and wherein the data length of the output sequence is variable.

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1. An apparatus for encoding source data, comprising: a first encoder configured to encode the source data to produce first additional data;a randomizing unit configured to randomize the source data to produce randomized data;a second encoder configured to encode the randomized data to produce secon

1. An apparatus for encoding source data, comprising: a first encoder configured to encode the source data to produce first additional data;a randomizing unit configured to randomize the source data to produce randomized data;a second encoder configured to encode the randomized data to produce second additional data; anda selector configured to select a number of bits from the first and second additional data to produce first selected data and second selected data, wherein the number of selected bits is selected based upon a data length of an output sequence determined by a transmission frame format, and wherein the data length of the output sequence is variable. 2. An apparatus for encoding source data, comprising: an encoder configured to encode the source data using a convolutional code to produce an additional data; anda selector configured to select a number of bits from the additional data to produce selected data, wherein the number of selected bits is selected based upon a data length of an output sequence determined by a transmission frame format, and wherein the data length of the output sequence is variable. 3. An apparatus for encoding source data, comprising: a first encoder configured to encode the source data using a convolutional code to produce first additional data;a second encoder configured to encode the source data using a convolutional code to produce second additional data; anda selector configured to select a number of bits from the first and second additional data to produce first selected data and second selected data, wherein the number of selected bits is selected based upon a data length of an output sequence determined by a transmission frame format, and wherein the data length of the output sequence is variable. 4. A base station device which transmits and receives a signal including encoded data to and from a mobile station radio, comprising: a first encoder configured to encode the source data to be transmitted to the mobile station to produce first additional data;an interleaver configured to interleave the source data to produce interleaved data;a second encoder configured to encode the interleaved data to produce second additional data; anda selector configured to select a number of bits from the first and second additional data to produce first selected data and second selected data, wherein the number of first and second selected data is selected based upon a data length of an output sequence determined by a transmission frame format and wherein the data length of the output sequence is variable. 5. A base station device which transmits and receives a signal including encoded data to and from a mobile station radio, comprising: an encoder configured to encode the source data using a convolutional code to be transmitted to the mobile station to produce first additional data; anda selector configured to select a number of bits from the additional data to produce selected data, wherein the number of selected data is selected based upon a data length of an output sequence determined by a transmission frame format and wherein the data length of the output sequence is variable. 6. A base station device which transmits and receives a signal including encoded data to and from a mobile station radio, comprising: a first encoder configured to encode the source data using a convolutional code to be transmitted to the mobile station to produce first additional data;a second encoder configured to encode the source data using a convolutional code to produce second additional data; anda selector configured to select a number of bits from the first and second additional data to produce first selected data and second selected data, wherein the number of first and second selected data is selected based upon a data length of an output sequence determined by a transmission frame format and wherein the data length of the output sequence is variable. 7. A mobile station device which transmits and receives a signal including encoded data to and from a base station, comprising: a first encoder configured to encode the source data to be transmitted to the base station to produce first additional data;an interleaver configured to interleave the source data to produce interleaved data;a second encoder configured to encode the interleaved data to produce second additional data; anda selector configured to select a number of bits from the first and second additional data to produce first selected data and second selected data, wherein the number of first and second selected data is selected based upon a data length of an output sequence determined by a transmission frame format and wherein the data length of the output sequence is variable. 8. A mobile station device which transmits and receives a signal including encoded data to and from a base station, comprising: an encoder configured to encode the source data using a convolutional code to be transmitted to the base station to produce additional data; anda selector configured to select a number of bits from the additional data to produce selected data, wherein the number of selected data is selected based upon a data length of an output sequence determined by a transmission frame format and wherein the data length of the output sequence is variable. 9. A mobile station device which transmits and receives a signal including encoded data to and from a base station, comprising: a first encoder configured to encode the source data using a convolutional code to be transmitted to the base station to produce first additional data;a second encoder configured to encode the source data using a convolutional code to produce second additional data; anda selector configured to select a number of bits from the first and second additional data to produce first selected data and second selected data, wherein the number of first and second selected data is selected based upon a data length of an output sequence determined by a transmission frame format and wherein the data length of the output sequence is variable.