Abstract: A start point time measurement section 53 measures the time at which a moving image request is input as start point time and a start point time determination section 59 determines whether the start point time is valid or invalid, and outputs only the valid start point time to a response time calculation section 52; an end point time measurement section 54 measures the time at which moving image display is started and an end point time determination section 58 determines whether the end point time measured by the end point time measurement section 54 is valid or invalid, and outputs only the valid end point time to the response time calculation section 52; and the response time calculation section 52 calculates the difference between the start point time and the end point time as the response time and an evaluation system 40 evaluates the satisfaction degree of the user at the response time and the like for monitoring and managing the response time in moving image service.

Abstract: A motion picture code evaluator evaluates a transmitted motion picture based on losses caused by a transmission means. The evaluator includes means for testing the frame header of the motion picture code and determining the presence/absence of an error in the frame header to calculate the frame loss ratio per predetermined time. The evaluator further includes means for extracting a motion picture coding parameter contained in the frame header and detecting a variation in the motion picture coding parameter in the predetermined time, and means for summing the motion picture coding parameter and the motion picture coding parameter weighted by the variation in a motion picture coding parameter in the predetermined time to calculate an ideal motion picture information amount in a predetermined time. The motion picture code evaluator thereby obtains an actual motion picture information amount by multiplying the ideal motion picture information amount by 1-frame loss ratio.

Abstract: A motion picture code evaluation apparatus for evaluating an amount of motion picture information after transmission, the apparatus has a header inspection unit for inspecting a frame header and determining that whether the frame header is abnormal or not to calculate frame loss ratio every predetermined time, an extracting unit for extracting motion picture coding parameter from the frame header and detecting variation of the motion picture coding parameter in the predetermined time, and an amount-of-motion-picture-information calculating unit for summing the motion picture coding parameter and weight, which is based on the variation of the motion picture coding parameter, to calculate an ideal amount of motion picture information every predetermined time, in which an actual amount of motion picture information is calculated by multiplying the ideal amount of motion picture information by (1−the frame loss ratio).

Abstract: A motion picture code evaluator evaluates a transmitted motion picture based on losses caused by a transmission means. The evaluator includes means for testing the frame header of the motion picture code and determining the presence/absence of an error in the frame header to calculate the frame loss ratio per predetermined time. The evaluator further includes means for extracting a motion picture coding parameter contained in the frame header and detecting a variation in the motion picture coding parameter in the predetermined time, and means for summing the motion picture coding parameter and the motion picture coding parameter weighted by the variation in a motion picture coding parameter in the predetermined time to calculate an ideal motion picture information amount in a predetermined time. The motion picture code evaluator thereby obtains an actual motion picture information amount by multiplying the ideal motion picture information amount by 1-frame loss ratio.

Abstract: A motion picture code evaluator applicable to motion picture codes such as a scalability code, PB frame code and multi-object code is to be provided.

Abstract: A transmitter 12 and a receiver 35 are connected to a network 20 for transferring data of moving image code as a packet between the transmitter 12 and the receiver 35. The transmitter 12 prepares a packet of moving image code from moving image data and outputs the packet to the network 20. In the receiver 35, a moving image reception section 31 receives a packet 61 input via the network 20, extracts the data bits of the moving image code sandwiched between synchronous codes from the received packet 61, and outputs the extracted bits of the moving image code to a moving image decoder 30. The moving image decoder 30 decodes the input moving image code into a digital moving image and outputs the provided digital moving image to a display 33, which then displays the input digital moving image on a display screen.

Abstract: A video distribution test system for performing simplified measurement under assumed conditions closer to the actual situation, and for performing tests for effective applications. The system includes a video packet simulator for defining different packet loss rates and simulating packet loss in video packets transmitted from the video distributing server for each packet loss rate, so as to produce defective video streams and evaluate an image quality of each defective stream, and producing a conversion table between the packet loss rate and the image quality; a pseudo-load generator for issuing pseudo-distribution requests from clients to the video distributing server; a packet quality monitor for receiving video packets from the server and calculating a packet loss rate for each client by detecting packet loss; and an image quality evaluating section for evaluating the image quality for each client based on the calculated packet loss rate and the conversion table.

Abstract: A load test system for the video data distributing server, by which the quality of distribution to all clients can be monitored without decreasing the number of simultaneous accesses. The load test system, inserted between real clients and a video data distributing server, comprises pseudo clients having a pseudo access generator for reproducing distribution request packets sent to the video data distributing server; a response section for sending response packets to the video data distributing server; and a manager for controlling each process of the load test and for collecting, analyzing, and displaying data. The system also has a packet quality monitor for monitoring a state of video data transmission by capturing packets communicated between the load test system and the video data distributing server. The monitored results are sent to the manager, and the quality of video images is evaluated based on the data analyzed by the manager.

Abstract: In a dynamic video communication evaluation equipment for analyzing codes by multiple methods for evaluating a dynamic video image, an analysis including estimation is performed to fix a reliability of the analysis result, enabling a processing termination in response to the analysis result in view of effective utilization of time or cost.

Abstract: A motion picture code evaluation apparatus for evaluating an amount of motion picture information after transmission, the apparatus has a header inspection unit for inspecting a frame header and determining that whether the frame header is abnormal or not to calculate frame loss ratio every predetermined time, an extracting unit for extracting motion picture coding parameter from the frame header and detecting variation of the motion picture coding parameter in the predetermined time, and an amount-of-motion-picture-information calculating unit for summing the motion picture coding parameter and weight, which is based on the variation of the motion picture coding parameter, to calculate an ideal amount of motion picture information every predetermined time, in which an actual amount of motion picture information is calculated by multiplying the ideal amount of motion picture information by (1−the frame loss ratio).

Abstract: An analytical system for moving picture regeneration is capable of ascertaining an appropriate method of improving the quality of a moving picture by executing satisfactory analysis of the state of moving picture regeneration. With the analytical system for moving picture regeneration, moving picture codes are decoded and regenerated by respective regeneration units. Thereupon, in each of the regeneration units, occurrence of picture freeze is detected by information subunits for picture freeze occurrence, a throughput is detected by throughput monitoring subunits, and delay in input time of the respective moving picture codes is detected by input-time information subunits and sent out to a display unit. Further, a SNR value is computed on the basis of a restored moving picture and a reference moving picture by respective SNR computation units, and a sum of the throughputs of the respective regeneration units is obtained by a total throughput monitoring unit, and sent out to the display unit.

Abstract: Moving image reception quality evaluator 4 for evaluating the reception quality of a moving image receiver 31 of the user, moving image reception quality evaluator 5 for evaluating the reception quality of a moving image receiver 32 for receiving the same moving image as the moving image receiver 31, and a determination machine 1 for determining the reception quality of the moving image receiver 31 based on comparison between the evaluation value of the moving image reception quality evaluator 4 and the evaluation value of the moving image reception quality evaluator 5 are provided. A quality provider for managing the moving image reception quality evaluator 4, the moving image reception quality evaluator 5, and the determination machine 1 pays the amount determined based on the reception quality determined by the determination machine 1 to a service provider for providing moving image communication service.

Abstract: A moving image reception quality evaluation apparatus has a moving image code reception section 101 for receiving the same moving image code branched by a branch unit 50 as the moving image code input to a moving image receiver 20 just before the moving image receiver 20 receives the moving image code, a moving image decoder section 102 having an equivalent function to a moving image decoder section 202 for decoding the moving image code in the moving image receiver 20 and detecting an anomaly of the moving image code, an image quality degradation evaluation section 103 for analyzing output of the moving image decoder section 102 and evaluating the image quality, and a transmission section 104 for transmitting the evaluation result to the outside.

Abstract: The present invention has the objective of offering an apparatus which comprehensively monitors networks which include small-scale computers and small-scale management protocols which are to be installed. In order to achieve the above objective, with respect to a system formed by a computer 22 and an analyzing apparatus 32 which are connected to a network 12, the present invention has the computer 22 connected to a network 52, and the computer 22 transmits a bit array received via the network 52 to the analyzing apparatus 32 as data. And the analyzing apparatus 32 analyzes the bit array, transmits the analysis result to the computer 22, and aides in the communication of the computer 22.