Patent ID: 8763049

Claim:
A server apparatus, connected to a mobile terminal via a packet forwarding apparatus(es) on a mobile network, the server apparatus comprising: a compression and encoding unit that compresses and encodes screen information or image information, downloaded from a Web server on the Internet in response to an instruction from the mobile terminal; a packet transmission unit that stores an output signal from the compression and encoding unit into a packet and transmits the packet to the mobile terminal via the packet forwarding apparatus(es); and a video image quality measurement unit that measures video image quality by referring to an input signal to the compression and encoding unit, a signal decoded from the output signal of the compression and encoding unit, a transmission timing of the packet, and a timing at which the mobile terminal receives the packet, wherein the video image quality measurement unit calculates a PSNR (Picture Signal to Noise Ratio) based on the input signal to the compression and encoding unit and the signal decoded from the output signal of the compression and encoding unit, calculates a response time based on the transmission timing of the packet and the timing at which the mobile terminal receives the packet, and derives the video image quality from the calculated PSNR and response time, and wherein the video image quality measurement unit derives as the video image quality a sum between the PSNR and the response time, respectively with weighting.