System and method for previewing video

A system for previewing a video, the system comprising:

• a camera including an image sensor, a sound sensor, a motion sensor including an ultrasonic sensor, and a first processor, the camera configured to:
• emit ultrasonic signals, by the ultrasonic sensor, to detect an object within a vicinity of the camera;
• detect at least one of an object, by the motion sensor, based on reflected ultrasonic signals or an ambient sound, by the sound sensor, that exceeds a threshold;
• generate a signal by the motion sensor indicating that the object is present or a signal by the sound sensor indicating the ambient sound exceeds the threshold;
• transmit the signal generated by the motion sensor or the sound sensor to the first processor;
• receive an instruction, from the first processor responsive to the signal generated by the motion sensor or the sound sensor, to start capturing a video;
• capture, by the image and sound sensors, the video,
• transmit a request for uploading the video,
• receive a response including an address for uploading the video, and upload the video;
• and
• a processing server including a second processor, the processing server configured to:
• receive the video,
• analyze the video,
• detect a special event from the analysis of the video by comparing an identified feature with one or more object, motion, or sound models previously constructed, the special event including at least one of an object, a moving object, or a sound detected in the video,
• extract, from the video, at least a first video preview frame or audio segment corresponding to the special event, wherein the processing server is further configured to skip frames before extracting a second video preview frame or audio segment, depending on whether the special event is detected in the first video preview frame or audio segment, wherein the skipped frames correspond to a time period selected by the processing server for skipping frames, a length of the time period being selected based on whether the special event is detected in a previous time period, and
• generate a preview video including the at least first video preview frame or audio segment corresponding to the special event.

A method for previewing a video, the method comprising:

• receiving the video captured by a camera, wherein the camera includes an image sensor, a sound sensor, and a motion sensor including an ultrasonic sensor;
• obtaining information relating to a potential special event detected by the camera, wherein the information relating to the potential special event is obtained by at least one of the motion sensor or the sound sensor, the ultrasonic sensor configured to emit ultrasonic signals to detect an object within a vicinity of the camera based on reflected ultrasonic signals and the motion sensor configured to generate a signal indicating that the object is present, the sound sensor configured to generate a signal if the sounds sensor detects an ambient sound level exceeding a threshold, wherein a processor of the camera is responsive to the signal generated by the motion sensor or the sound sensor to instruct the image sensor to start capturing the video;
• analyzing the captured video;
• detecting a special event from the analysis of the video by comparing an identified feature with one or more object, motion, or sound models previously constructed, the special event including at least one of an object, a moving object, or a sound detected in the video;
• extracting, from the video, at least a first video preview frame or audio segment corresponding to the special event based on information relating to the potential special event, and skipping frames before extracting a second video preview frame or audio segment, depending on whether the special event is detected in the first video preview frame or audio segment, wherein the skipped frames correspond to a time period selected for skipping frames, a length of the time period being selected based on whether the special event is detected in a previous time period;
• and
• generating a preview video including the at least first video preview frame or audio segment corresponding to the special event.

A method for previewing a video, the method comprising:

• emitting ultrasonic signals, by an ultrasonic sensor, to detect an object within a vicinity of a camera, wherein the camera includes an image sensor, a sound sensor, a motion sensor including the ultrasonic sensor, and a camera processor;
• at least one of detecting an object based on reflected ultrasonic signals or detecting by the sound sensor if an ambient sound level exceeds a threshold;
• at least one of generating a signal, by the motion sensor, indicating that the object is present or generating a signal, by the sound sensor, indicating the ambient sound level exceeds the threshold;
• receiving an instruction, from the camera processor responsive to the signal generated by the motion sensor or the sound sensor, to start capturing the video by the image sensor and the sound sensor;
• capturing, by the camera, the video;
• transmitting, by the camera, a request for uploading the video;
• receiving, by the camera, a response including an address for uploading the video;
• transmitting, by the camera, the video to the address included in the response;
• receiving, by a processing server, the video;
• analyzing, by the processing server, the video;
• detecting, by the processing server, a special event from the analysis of the video by comparing an identified feature with one or more object, motion, or sound models previously constructed, the special event including at least one of an object, a moving object, or a sound detected in the video;
• extracting, by the processing server, from the video at least a first video preview frame or audio segment corresponding to the special event, wherein the processing server is further configured to skip frames before extracting a second video preview frame or audio segment, depending on whether the special event is detected in the first video preview frame or audio segment, wherein the skipped frames correspond to a time period selected by the processing server for skipping frames, a length of the time period being selected based on whether the special event is detected in a previous time period;
• and
• generating, by the processing server, a preview video including the at least first video preview frame or audio segment corresponding to the special event.

A non-transitory computer readable medium embodying a computer program product, the computer program product comprising instructions configured to cause a computing device to:

• receive the video captured by a camera, wherein the camera includes an image sensor, a sound sensor, and a motion sensor including an ultrasonic sensor;
• obtain information relating to a potential special event detected by the camera, wherein the information relating to the potential special event is obtained by at least one of the motion sensor or the sound sensor, the ultrasonic sensor configured to emit ultrasonic signals to detect an object within a vicinity of the camera based on reflected ultrasonic signals and the motion sensor configured to generate a signal indicating that the object is present, the sound sensor configured to generate a signal if the sounds sensor detects an ambient sound level exceeding a threshold, wherein a processor of the camera is responsive to the signal generated by the motion sensor or the sound sensor to instruct the image sensor to start capturing the video;
• analyze the captured video;
• detect a special event from the analysis of the video by comparing an identified feature with one or more object, motion, or sound models previously constructed, the special event including at least one of an object, a moving object, or a sound detected in the video;
• extract, from the video, at least a first video preview frame or audio segment corresponding to the special event based on information relating to the potential special event, wherein the instructions further cause the computing device to skip frames before extracting a second video preview frame or audio segment, depending on whether the special event is detected in the first video preview frame or audio segment, wherein the skipped frames correspond to a time period selected for skipping frames, a length of the time period being selected based on whether the special event is detected in a previous time period;
• and
• generate a preview video including the at least first video preview frame or audio segment corresponding to the special event.