Method and system of image processing with power reduction while using a universal serial bus camera

A system comprising:

• a universal serial bus (USB) camera;
• and
• a compute device including:
• memory;
• instructions;
• at least one processor circuit to be programmed based on the instructions to activate a power savings mode of the USB camera, the power savings mode to cause the USB camera to switch from empty data responses to negative acknowledgement (NAK) responses to respond to data requests from the compute device when there is no image data for the USB camera to transmit, the data requests according to an isochronous mode of a USB protocol;
• and
• a USB host controller to:
• receive image data responses associated with frames of a video from the USB camera at intervals based on the USB protocol, the image data responses based on the data requests;
• and
• receive the NAK responses from the camera between the image data responses associated with consecutive frames of the video without triggering an awakening from an enabled low power state of the compute device, the NAK responses based on the data requests.

A compute device comprising:

• memory;
• instructions;
• at least one processor circuit to be programmed based on the instructions to activate a power savings mode of a universal serial bus (USB) camera, the power savings mode to cause the USB camera to switch from empty data transmissions to negative acknowledgement (NAK) transmissions to respond to data requests from the compute device when there is no image data for the USB camera to transmit, the data requests according to an isochronous mode of a USB protocol;
• and
• a USB host controller to:
• receive image data transmissions associated with frames of a video from the USB camera at intervals based on the USB protocol, the image data transmissions based on the data requests;
• and
• receive the NAK transmissions between the image data transmissions of consecutive frames of the video without triggering an awakening from an enabled low power state of the compute device, the NAK transmissions based on the data requests.

At least one non-transitory article comprising instructions to cause a universal serial bus (USB) host controller of a compute device to at least:

• activate a power savings mode of a USB camera to cause the USB camera to switch from empty data transmissions to negative acknowledgement (NAK) transmissions to respond to data requests from a compute device when there is no image data for the USB camera to transmit, the data requests according to an isochronous mode of a USB protocol;
• receive image data transmissions associated with frames of a video from the USB camera at intervals and based on the USB protocol, the image data transmissions based on the data requests;
• and
• receive the NAK transmissions between the image data transmissions of consecutive frames of the video without triggering an awakening from an enabled low power state the compute device, the NAK transmissions based on the data requests.