Abstract: A method is described for secure video processing. The method comprises storing an encrypted video stream (1) in a public stream buffer (2) in public memory accessible by a central processing unit (4) and allocating a private stream buffer (6) at a buffer location in private memory which is accessible by a decryption unit (10), wherein the private memory is not accessible for the central processing unit (4). The method then comprises decrypting the encrypted video stream (1) in the public stream buffer (2) to the private stream buffer (6) at the allocated buffer location (8) in private memory as an associated decrypted video stream (5); appending the allocated buffer location (8) to the public stream buffer (2); and configuring a video decoder unit (12) to read the decrypted video stream (5) from the private stream buffer (6) at the buffer location (8) for further processing.

Abstract: A method is described for secure video processing. The method comprises storing an encrypted video stream (1) in a public stream buffer (2) in public memory accessible by a central processing unit (4) and allocating a private stream buffer (6) at a buffer location in private memory which is accessible by a decryption unit (10), wherein the private memory is not accessible for the central processing unit (4). The method then comprises decrypting the encrypted video stream (1) in the public stream buffer (2) to the private stream buffer (6) at the allocated buffer location (8) in private memory as an associated decrypted video stream (5); appending the allocated buffer location (8) to the public stream buffer (2); and configuring a video decoder unit (12) to read the decrypted video stream (5) from the private stream buffer (6) at the buffer location (8) for further processing.

Abstract: A method for scrolling MPEG-compressed pictures consists in decoding a sequence of pictures (34, 35, 36) or any two pictures to be viewed by a MPEG decoder (5) and storing the sequence of pictures (35, 35, 36) or any two pictures in MPEG decoder memory. Then the sequence of pictures (34, 35, 36) or any two pictures is formed as a group of pictures (37), which is transferred to the first screen buffer (24) which is active. In the following step, any another compressed picture, after decoding in the MPEG decoder (5), is stored in a MPEG decoder memory as a decoder new picture and then is transferred from the MPEG decoder memory to the first screen buffer (24), where its edge line perpendicular to the intended scrolling direction is adjoined to the external edge of the group of pictures (37).

Abstract: A cable modem for connecting Customer Premises Equipment (CPE) includes a Media Access Control (MAC) layer controller, a Logical Link Control (LLC) bridge (113) interacting with the MAC layer controller, an IP stack processing IP frames and interacting with the LLC bridge (113), CPE interfaces (115, 116 and 117) and a multiplexer (114) of Customer Premises Equipment (CPE) interfaces linked to the CPE interfaces and to the LLC bridge (113). The CPE interfaces (115, 116 and 117) communicate with the multiplexer (114) through appropriate functions. The multiplexer (114) has functionality allowing for servicing the flow of frames between the cable network and the interfaces linked to it, directing the received frames to appropriate interfaces.