초록 ▼

Cashless transactions are performed by transmitting information identifying a purchaser of a product without identifying a payment account for the purchaser. The transmitted identifying information is received at a central processing point and processed to determine if the purchaser is a registered

Cashless transactions are performed by transmitting information identifying a purchaser of a product without identifying a payment account for the purchaser. The transmitted identifying information is received at a central processing point and processed to determine if the purchaser is a registered purchaser. A notice confirming registration, which may take the form of a purchase authorization, is transmitted from the central processing point if the purchaser is determined to be registered. The transmitted notice is received at the point of purchase and a bill is generated for the purchased product responsive to receipt of the notice.

대표청구항 ▼

Cashless transactions are performed by transmitting information identifying a purchaser of a product without identifying a payment account for the purchaser. The transmitted identifying information is received at a central processing point and processed to determine if the purchaser is a registered

Cashless transactions are performed by transmitting information identifying a purchaser of a product without identifying a payment account for the purchaser. The transmitted identifying information is received at a central processing point and processed to determine if the purchaser is a registered purchaser. A notice confirming registration, which may take the form of a purchase authorization, is transmitted from the central processing point if the purchaser is determined to be registered. The transmitted notice is received at the point of purchase and a bill is generated for the purchased product responsive to receipt of the notice. nserting a predetermined complement packet in the receiving buffer, the complement packet being the one outputted encoded packet; detecting whether a synthetic voice signal which is generated by the voice decoder is speech signal or non-speech signal; if a result of the speech/non-speech detecting is non-speech for the preceding fixed period, and a number of receiving packets stored in the receiving buffer is larger than a predetermined adjustment packet number, then discarding the oldest packet stored in the receiving buffer, the next oldest packet in the receiving buffer being the one outputted encoded packet; and if a result of the speech/non-speech detecting is speech for the fixed period preceding the one fixed period, or the number of receiving packets stored in the receiving buffer is not larger than the predetermined adjustment packet number, then the oldest packet in the receiving buffer is the one outputted encoded packet. 4. The method of claim 3, further comprising: providing an initial value of the adjustment packet number; counting a number of the discarded encoded packets against a predetermined number of the outputted encoded packets; comparing the number of the discarded encoded packets with a predetermined discarded packet number each time the predetermined number of the encoded packets is outputted; and if the number of the discarded encoded packets is larger than the predetermined discarded packet number, then increasing the adjustment packet number, and if not, decreasing the adjustment packet number. 5. The method of claim 3, wherein the complement packet is the same as the encoded packet which is output in the preceding fixed period. 6. A voice packet decoder, comprising: a receiving buffer for storing a plurality of receiving packets received from a network and outputting one of the stored receiving packets as an encoded packet in each one of a sequence of fixed periods; a complement packet insert circuit for inserting a predetermined complement packet in the receiving buffer, if, in any fixed period, no receiving packets are stored in the receiving buffer; a counter to which one is added when the complement packet insert circuit inserts the predetermined complement packet; a voice decoder for generating a synthetic voice signal based on the encoded packet; a speech/non-speech detection circuit for detecting whether the synthetic voice signal is speech signal or non-speech signal; and a receiving buffer controller for (1) discarding the oldest packet stored in the receiving buffer, causing the receiving buffer to output the next oldest packet and subtracting one from the counter's value, when a result of the speech/non-speech detecting is non-speech, the counter's value is more than zero, and a number of the receiving packets stored in the receiving buffer is more than one; (2) causing the receiving buffer to output the oldest packet when the result of the speech/non-speech detecting is speech, or the counter's value is zero, or the number of receiving packets stored in the receiving buffer is one; and (3) causing the receiving buffer to output the complement packet when no receiving packets are stored in the receiving buffer. 7. The voice packet decoder of claim 6, wherein the complement packet is the same as the encoded packet which is output in the preceding fixed period. 8. A voice packet decoder, comprising: a receiving buffer for storing a plurality of receiving packets received from a network and outputting one of the stored receiving packets as an encoded packet in each one of a sequence of fixed periods; a complement packet insert circuit for inserting a predetermined complement packet in the receiving buffer, if, in any fixed period, no receiving packets are stored in the receiving buffer; a voice decoder for generating a synthetic voice signal based on the encoded packet; a speech/non-speech detection circuit for detecting whether the synthetic voice signal is spe ech signal or non-speech signal; and a receiving buffer controller for (1) discarding the oldest packet stored in the receiving buffer and causing the receiving buffer to output the next oldest packet, when a result of the speech/non-speech detecting is non-speech, and a number of the receiving packets stored in the receiving buffer is larger than a predetermined adjustment packet number; (2) causing the receiving buffer to output the oldest packet when the result of the speech/non-speech detecting is speech or the number of the number of the receiving packets stored in the receiving buffer is not larger than the predetermined adjustment packet number; and (3) causing the receiving buffer to output the complement packet when no receiving packets are stored in the receiving buffer. 9. The voice packet decoder of claim 8, further comprising: an initial value providing circuit for providing an initial value of the adjustment packet number; and a discarded packet counter for counting a number of the discarded packets against a predetermined number of the outputted encoded packets; wherein the receiving buffer controller is further capable of comparing the number of the discarded packets with a predetermined discarded packet number each time the predetermined number of the encoded packets is outputted and, if the number of the discarded packets is larger than the predetermined discarded packet number, then increasing the adjustment packet number, and if not, decreasing the adjustment packet number. 10. The voice packet decoder of claim 8, wherein the complement packet is the same as the encoded packet which is output in the preceding fixed period.