| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that a TV telephone system is difficult to become widely used because the opposite party also needs the same system as that of a calling side. SOLUTION: First, in a transmission and reception connection step 201, the transmission and reception system of the opposite party desired to be talked with is connected in starting speech communication by a TV telephone. Next, in a transmission and reception system information transmission and reception system 202, the kinds of the transmission and reception systems connected to each other are transmitted and received. In a function limitation decision step 203, it is judged which kinds the connected transmission and reception systems respectively belong to. For instance, when both the connected transmission and reception systems belong to the second kind transmission and reception system here, AV data are prohibited from being transmitted and received after that. On the contrary, when at least either of them belongs to the first kind transmission and reception system, AV data obtained from the digital video cameras of each other in an AV data transmission and reception step 204 are transmitted and received. |
