Patent ID: 7646793

Claim:
A transmission method of transmitting data having a predetermined data length as a unit between devices for transmitting data through an IEEE 1394 bus by a predetermined format, said transmission method comprising the steps of: locating label data indicating a system of transmitted audio stream data at a starting portion of said data having said predetermined data length as a unit by use of a processing section of a respective one of the devices; and locating said audio stream data of said system at an interval behind said label data and transmitting resultant data by use of the processing section of the respective one of the devices, wherein said predetermined format is a format complying with a protocol for transmitting data in an isochronous transfer mode of an IEEE 1394 bus and a plurality of data having said predetermined data length as a unit are located at an interval following a header prescribed by said protocol, and wherein sub-label data is located at an interval following said label data, and data accompanying said audio stream data of said system is located at an interval following said sub-label data in data of a part of a unit of said plurality of data having the predetermined data length as a unit, and said audio stream data of said system is located at an interval following said label data in data of a remaining unit.