Information processing apparatus, information processing method, and program
An information processing apparatus includes an input unit, a storage unit, and a control unit. The input unit receives processed data having resulted from a process in which a test-content is read and processed by a device to be evaluated. The test-content is composed of a plurality of units for reproduction ordered along a time axis, each unit for reproduction having feature points, the number of the feature points monotonically increasing or decreasing by a predetermined difference along passage of reproduction time. The storage unit stores the predetermined difference. The control unit calculates the numbers of the feature points with respect to each of two adjacent units among the units for reproduction in the processed data, and detects an error in the processed data by determining whether or not a difference between the calculated numbers of the feature points is equal to the stored difference.
1. An information processing apparatus, comprising:
an input unit configured to receive processed data having resulted from a process in which a test-content is read and processed by a device to be evaluated, the test-content being composed of a plurality of units for reproduction ordered along a time axis, each unit for reproduction having feature points, the number of the feature points monotonically increasing or decreasing by a predetermined difference along passage of reproduction time;
a storage unit configured to store the predetermined difference; and
a control unit configured to
calculate the numbers of the feature points with respect to each of two adjacent units among the units for reproduction in the processed data, and
detect an error in the processed data by determining whether or not a difference between the calculated numbers of the feature points is equal to the stored difference.
2. The information processing apparatus according to claim 1 , wherein
the control unit is configured to determine that the error is a noise error including a contamination of noise in the processed data in cases where
the calculated difference is not equal to the stored difference, not zero, and not an integer multiple of the stored difference.
3. The information processing apparatus according to claim 1 , wherein
the control unit is configured to determine that the error is a repeat error including a repetition of a certain part of the units for reproduction in the processed data in cases where
the calculated difference is not equal to the stored difference and
the calculated difference is zero.
4. The information processing apparatus according to claim 1 , wherein
the control unit is configured to determine that the error is a skip error in which a certain part of the units for reproduction in the processed data is skipped, in cases where
the calculated difference is not equal to the stored difference and
the calculated difference is an integer multiple of the stored difference.
5. The information processing apparatus according to claim 1 , wherein
the monotonic increase or decrease of the feature points is periodically repeated every predetermined edge point in the test-content, and
the control unit is configured to determine that the error has occurred, in cases where
at least one of the numbers of the feature points with respect to each of two units across the edge point among the units for reproduction is zero, and
the calculated difference between the numbers of the feature points with respect to each of the two units is different from a difference between predetermined maximum and minimum values of the number of the feature points.
6. The information processing apparatus according to claim 1 , wherein
the test-content is a video content having a plurality of frames as the units for reproduction, and
the control unit is configured to
extract two pieces of still image data which are two frames from the processed data and
extract feature points and calculate the number of the feature points from each of the two pieces of still image data.
7. The information processing apparatus according to claim 1 , wherein
the test-content includes audio data having pieces of waveform data as the units for reproduction, each piece of waveform data being data between a plurality of periodically repeated mute intervals, the piece of waveform data having a frequency as the number of the feature points, the frequency monotonically increasing or decreasing across each mute interval in the mute intervals, and
the control unit is configured to
extract two pieces of waveform data across each mute interval from the processed data and
calculate the frequencies of each of the two pieces of waveform data.
8. The information processing apparatus according to claim 1 , further comprising
an output unit configured to output information of a result of detection indicating the detected error.
9. An information processing method, comprising:
reading processed data having resulted from a process in which a test-content is read and processed by a device to be evaluated, the test-content being composed of a plurality of units for reproduction ordered along a time axis, each unit for reproduction having feature points, the number of the feature points monotonically increasing or decreasing by a predetermined difference along passage of reproduction time;
calculating the numbers of the feature points with respect to each of two adjacent units among the units for reproduction in the processed data; and
detecting an error in the processed data by determining whether or not a difference between the calculated numbers of the feature points is equal to the stored difference.