Abstract: An acquisition unit capable of providing more flexible services includes an acquisition unit that acquires a first stream; a transformer that transforms a first picture included in the first stream into a second picture, the first picture being irreversibly encoded, the second picture being reversibly encoded; and an output unit that outputs a second stream including the second picture.

Abstract: An acquisition unit capable of providing more flexible services includes an acquisition unit that acquires a first stream; a transformer that transforms a first picture included in the first stream into a second picture, the first picture being irreversibly encoded, the second picture being reversibly encoded; and an output unit that outputs a second stream including the second picture.

Abstract: A mobile wireless terminal is provided that controls a timing or a position in which handover is conducted between a plurality of access points, the terminal includes an antenna that receives a radio wave from an access point, a wireless communication interface that measures the radio wave, a processor, and a memory. The processor stores first and second received powers from respective first and second access points in the memory, conducts handover where a difference acquired by subtracting the first received power from the second received power is equal to or greater than a predetermined threshold, estimates a first available bandwidth before the handover and stores it in the memory, estimates a second available bandwidth after the handover and stores it in the memory, and controls a timing when handover of the mobile wireless terminal is conducted based on an available bandwidth difference between the first and second available bandwidths.

Abstract: A mobile wireless terminal is provided that controls a timing or a position in which handover is conducted between a plurality of access points, the terminal includes an antenna that receives a radio wave from an access point, a wireless communication interface that measures the radio wave, a processor, and a memory. The processor stores first and second received powers from respective first and second access points in the memory, conducts handover where a difference acquired by subtracting the first received power from the second received power is equal to or greater than a predetermined threshold, estimates a first available bandwidth before the handover and stores it in the memory, estimates a second available bandwidth after the handover and stores it in the memory, and controls a timing when handover of the mobile wireless terminal is conducted based on an available bandwidth difference between the first and second available bandwidths.

Abstract: An access point is connected with surveillance cameras through wireless communication means. In the access point, a packet identification unit identifies the surveillance camera. A receiving status measurement unit measures receiving speed of the image data for each surveillance camera, and a priority apparatus determination unit determines whether to prioritize receiving of image data from a surveillance camera with the receiving speed smaller than a reference speed. The receiving control unit transmits a CTS packet, indicating that data receiving from the surveillance camera determined by the priority apparatus determination unit will be prioritized, to all of the connected surveillance cameras. The surveillance cameras other than that indicated by the CTS packet pause the data transmission to the access point when the CTS packet is received.

Abstract: An access point is connected with surveillance cameras through wireless communication means. In the access point, a packet identification unit identifies the surveillance camera. A receiving status measurement unit measures receiving speed of the image data for each surveillance camera, and a priority apparatus determination unit determines whether to prioritize receiving of image data from a surveillance camera with the receiving speed smaller than a reference speed. The receiving control unit transmits a CTS packet, indicating that data receiving from the surveillance camera determined by the priority apparatus determination unit will be prioritized, to all of the connected surveillance cameras. The surveillance cameras other than that indicated by the CTS packet pause the data transmission to the access point when the CTS packet is received.

Abstract: A wireless moving image transmission terminal for encoding and wirelessly transmitting data comprises a moving image acquisition unit for acquiring data to be reproduced in time sequence, an encoder for encoding the data acquired in the moving image acquisition unit by inter-frame predictive encoding in units of frame and generating encoded data, a wireless transmission/reception unit for wirelessly transmitting the encoded data, a wireless state determination unit for determining a wireless state of the wireless transmission/reception unit, and when determining that the wireless state is deteriorated, interrupting transmission of the encoded data by the wireless transmission/reception unit, and a referenced frame designation unit for, when the wireless state determination unit interrupts transmission of the encoded data by the wireless transmission/reception unit , designating a referenced frame for inter-frame predictive encoding in the encoder.