Abstract: A method of dynamically showing a water mark is applied in an audio/video transmitter. The audio/video transmitter includes a plurality of display contents such as a playback area name, a playback date, a playback time and an identification mark. The audio/video transmitter continues obtaining a plurality of frames from an audio/video source such as an audio/video server or an audio/video database and temporarily stores the frames in a buffer. The audio/video transmitter also produces a water mark from at least one display content according to a plurality of display conditions such as display coordinates, appearance, time and frequency, and composes the water mark with at least one frame stored in the buffer to form at least one display screen, and shows the display screen on an output unit, such that the water mark on the display screen cannot be changed or overwritten, and viewers can identify the water mark easily.

Abstract: A method for distributing encrypted digital content is disclosed in the invention. Firstly, a digital content of a source is encrypted via a symmetric key encryption mechanism by using a first public key, so as to generate an encrypted digital content; the first public key is also encrypted to generate an encryption key at the source by using a second public key via an asymmetric key encryption mechanism provided from a destination, so that the encryption key may only be decrypted by using a private key compatible with the second public key at the destination. Therefore, no matter the encrypted digital content is distributed via secure or insecure routes, the ones who are not at the destination cannot access the digital content.

Abstract: In a dynamic multilayer video processing method applied to a signal receiving apparatus, the signal receiving apparatus is connected to a display device.

Abstract: The present invention is to provide a method for centrally distributing screensaver video to protect display devices, which is implemented to a central VOD system comprising a remote video server, a plurality of signal transmission devices, and display devices each connected to a signal transmission device. The remote video server has a plurality of ordinary video data and at least a screensaver video data therein; each signal transmission device may receive a screensaver video data and at least one ordinary video data, and then transmit the screensaver video data and the ordinary video data to the display device connected thereto. The signal transmission device outputs the screensaver data on the display device when not receiving any control signal within a predetermined period of time, and does not resume the original ordinary video data on the display device unless the signal transmission device receives the control signal again.

Abstract: A video on demand system for providing graceful degradation and fault tolerance comprises a plurality of media storage ends, a first level network device, and a plurality of video trunk combiners. Each of the media storage ends respectively stores a plurality of video files, and provides a plurality of frequency channels to transmit the video files. The first level network device receives each of the frequency channels provided by each of the media storage ends, and externally transmits at least one of the frequency channels provided by at least two of the media storage ends. Each of the video trunk combiners is connected between the first level network device and at least one user end, and receives the at least one of the frequency channels provided by at least two of the media storage ends via the first level network device.

Abstract: A video server system and method has a modular and expandable system design to deliver a plurality of video streams on user demand and under user control. The video server system and method has a central control module adapted to receive control commands such as SELECT, PLAY, REWIND, PAUSE etc. to select and playback a video from a plurality of videos stored in a storage module. The central control module is a computer motherboard having a first small computer serial interface (SCSI) coupled to the storage device. The central control module also has memory for buffering data blocks of video retrieved from the storage device or devices prior to delivery to the delivery module also included in the system. The delivery module is also a computer motherboard having memory and also having a plurality of video processors for processing the video data prior to coupling the data to a client location.