Abstract: It is possible to manage a correlation between a presence and absence of a so-called up-selling talk, in which a clerk recommends that a customer buy an item, and a sales performance of the recommended item. A device includes a voice input unit that inputs a voice from a microphone in a store, a sales management unit that inputs sales data of the store, a storage unit that stores the sales data, a detector that detects whether or not a first keyword is included in the voice input to the voice input unit, and a determiner that determines whether or not the sales data is stored in the storage unit within a predetermined time from the time when it is detected by the detector that the first keyword is included.

Abstract: A packet transmission method wherein, when the sum of the bands of a plurality of flows including packets having the same priority exceeds the guaranteed band shared by these flows, a packet belongs to a flow having an earlier transmission start time is given a higher priority than a packet belongs to a flow having a later transmission start time on the in order of arrival basis based on the transmission start time. A classifier controls the token thresholds and a priority control mechanism controls the discard thresholds based on each flow to use for deciding the conditions.

Abstract: In a packet transmission apparatus 24, an identifier assigning section 214 assigns one of first to third priority identifiers to a currently-received packet Pb, and passes the packet to a packet transmitting section 28 as a packet Pc. The packet transmitting section 28 performs a necessary process on the received packet Pc, and outputs the processed packet to an interconnection link 4 as a packet Pd. Thus, the packet transmission apparatus 24 can perform priority control with excellent transmission quality while assuring a contracted bandwidth.

Abstract: Multicast packets are provided to a multicast queue and packets besides multicast packets are provided to queues, each of which is provided according to each user terminal. The transmittable band of a queue corresponding to a user terminal that uses multicast is reduced in accordance with the number of multicast traffic used and the number of group members and thereby handled as if the queue has consumed the guaranteed band to thereby guarantee the guaranteed band of each user.

Abstract: A speech coding transmission system is disclosed in which a coder of a differential coding system quantizes a difference between a predictive value from an adaptive predictor and an input speech signal by an adaptive quantizer in accordance with the level of the latter and to send out the resulting coded signal to transmission medium, and a decoder outputs a reproduced speech signal on the basis of a residual signal obtained by inversely quantizing a received coded signal with an inverse adaptive quantizer and a predictive value from an adaptive predictor. Both or either one of the coder and the decoder includes a comparator-attenuator which attenuates the amplitude of the input signal or reproduced speech signal to a value smaller than a predetermined threshold value and applies to the amplitude-attenuated speech signal to the adaptive predictor.