| 主权项 |
1. An automatic test system (1) for a digital display system (2), which digital display system (2) comprises:
display electronics (21) configured to generate a digital-born video stream (“digital video stream”); and a display screen (22) connected to the display electronics (21) to receive the digital video stream generated thereby, and designed to display at least one image based on the received digital video stream;the automatic test system (1) being designed to be connected to the digital display system (2) to receive the digital video stream generated by the display electronics (21), and being configured to:
reconstruct in memory an image based on the received digital video stream, wherein the image reconstructed in memory, based on the received digital video stream, corresponds to the entire display screen (22); compute a signature of the reconstructed-in-memory image, wherein the signature is computed from the reconstructed-in-memory image based on a cyclic redundancy check (CRC); test the digital display system (2) by comparing the computed signature with a reference signature so as to thereby check whether the computed signature completely matches a reference signature so as to determine whether the reconstructed-in-memory image completely matches an expected display behavior, wherein said reference signature is indicative of said expected display behavior; extract from the reconstructed-in-memory image one or more sub-images, each corresponding to a respective subarea of the display screen (22); compute a signature of at least one extracted sub-image based on CRC; test the digital display system (2) by comparing the computed signature of the at least one extracted sub-image with a respective reference signature to check whether the signatures completely match so as to thereby check whether the image for which said signature has been computed completely matches a respective expected display behavior, wherein said respective reference signature is indicative of said respective expected display behavior; compress the reconstructed-in-memory image and each extracted sub-image; and generate a test log indicating, for each performed comparison, a pass result if the compared signatures match, and a fail result if the compared signatures fail to match, wherein the test log contains: the compressed reconstructed-in-memory image, if the computed signature of the reconstructed-in-memory image and the respective reference signature fail to match; and a compressed sub-image, if the computed signature of the sub-image and the respective reference signature fail to match. |
