초록 ▼

A mobile telephone has a receiver, a transmitter, a microprocessor and an associated memory. The memory includes a first-in-first-out (FIFO) queue and a static buffer. An audio signal carried by the mobile telephone is digitized and provided to the microprocessor. The resulting digital signal is con

A mobile telephone has a receiver, a transmitter, a microprocessor and an associated memory. The memory includes a first-in-first-out (FIFO) queue and a static buffer. An audio signal carried by the mobile telephone is digitized and provided to the microprocessor. The resulting digital signal is continuously written to the FIFO queue. In response to a first command from the mobile telephone user, the microprocessor causes the contents of the FIFO queue to be transferred to the static buffer. Upon a second command from the user, the contents of the buffer are converted to an analog signal and played back over the mobile telephone's speaker.

대표청구항 ▼

[ What is claimed is:] [1.] Apparatus comprising:a circuit for carrying a first and a second audio signal;a microprocessor coupled to said circuit and receiving said first and second audio signal from said circuit;a first memory coupled to said microprocessor for storing a predetermined length of sa

[ What is claimed is:] [1.] Apparatus comprising:a circuit for carrying a first and a second audio signal;a microprocessor coupled to said circuit and receiving said first and second audio signal from said circuit;a first memory coupled to said microprocessor for storing a predetermined length of said audio signal on a first-in-first-out basis, said first memory including a plurality of blocks of memory wherein said microprocessor combines said first audio signal and said second audio signal prior to storing said signals in said first memory;a second memory coupled to said microprocessor;means for transferring a first block of said plurality of blocks to said second memory in response to a first user command;means for freezing the contents of said first memory in response to said first user command; andmeans for transferring a second block of said plurality of blocks to said second memory in response to the receipt of a second user command within a predetermined period of time.