15. A processing system, comprising: a decoder to decode a real-time transmission of a presentation; a memory buffer to copy images of the presentation and convert the images into snapshot images including a first copy of the image and a second copy images; a transmitter to transmit the snapshot images to a local external annotation device that is located locally to the processing system; and a receiver to receive local annotation data of an annotation performed on the snapshot images at the local annotation device, wherein the local annotation data is transmitted to a source of the real-time transmission to be encoded into the real-time transmission, so that the real-time transmission includes the annotation, wherein the annotation is drawn in the memory buffer according to the annotation data in real-time on the second copy of the images in the memory buffer, such that annotated snapshot images are formed from the second copy of the images in the memory buffer and transmitted to the local external annotation device, to provide real-time feedback of drawing the annotation on the local external annotation device; and wherein the first copy of the images in the memory buffer is utilized for forming the snapshots when the annotation is cleared.
15. A processing system, comprising: a decoder to decode a real-time transmission of a presentation; a memory buffer to copy images of the presentation and convert the images into snapshot images including a first copy of the image and a second copy images; a transmitter to transmit the snapshot images to a local external annotation device that is located locally to the processing system; and a receiver to receive local annotation data of an annotation performed on the snapshot images at the local annotation device, wherein the local annotation data is transmitted to a source of the real-time transmission to be encoded into the real-time transmission, so that the real-time transmission includes the annotation, wherein the annotation is drawn in the memory buffer according to the annotation data in real-time on the second copy of the images in the memory buffer, such that annotated snapshot images are formed from the second copy of the images in the memory buffer and transmitted to the local external annotation device, to provide real-time feedback of drawing the annotation on the local external annotation device; and wherein the first copy of the images in the memory buffer is utilized for forming the snapshots when the annotation is cleared. 16. The processing system according to claim 15 , wherein the real-time transmission of the presentation includes an annotation from a remote annotation device that is located remotely to the processing system.