5 results about "Digital video interface" patented technology

The application discloses a HDMI signal receiving method of self-adaptive sampling window and indirect line field recovery, and relates to the technical field of digital video interface. The method performs sampling alignment processing based on an IDELAY delay unit and an ISERDES serial-parallel conversion unit in an FPGA chip, detects continuous control characters to demarcate an effective sampling window and lock the midpoint as a sampling point, and completes bit alignment and word alignment through automatic traversal of delay gears and bit sequence adjustment. Then, for three-way data of completed channel synchronization, a stable data valid signal de is generated by judging non-control characters for M clock periods, and a line field synchronization signal is indirectly calculated based on the de signal and standard timing parameters. The application does not need an external physical layer decoding chip, has low cost, can adaptively offset the phase, effectively filters signal burrs, and improves the anti-interference ability of line field synchronization.

This disclosure provides a method, apparatus, device, and medium for verifying digital content playback devices. The specific implementation scheme is as follows: In response to determining that the operating system's kernel layer has started, a driver for managing digital video interfaces of the operating system is loaded to call the kernel layer to generate a target node; In response to the operating system's application layer starting, first pre-stored data is obtained from the disk of the digital content playback device through the application layer, and the first pre-stored data is transmitted to the driver via the target node; wherein, the first pre-stored data is used to obtain at least a portion of the verification key data corresponding to the digital content playback device, and the verification key data is used for digital content protection verification; Based on the first pre-stored data transmitted to the driver, data is stored in memory space by the driver; In response to receiving a verification request from a digital content source device, the verification key data is determined based on the data stored in memory space to perform digital content protection verification on the digital content playback device.

This disclosure provides a method, apparatus, device, and medium for verifying a digital content playback device. The specific implementation scheme is as follows: During the operating system startup process of the digital content playback device, first pre-stored data obtained from the disk of the digital content playback device is stored in a target space of the internal memory; wherein, the first pre-stored data is used to obtain at least a portion of the verification key data corresponding to the digital content playback device, and the verification key data is used for digital content protection verification; the operating system's driver for managing the digital video interface is loaded to obtain the first pre-stored data from the target space; based on the obtained first pre-stored data, the verification key data is determined; in response to receiving a verification request from a digital content source device, digital content protection verification is performed on the digital content playback device based on the verification key data.

The invention provides an anti-mouse overflow multi-screen extended display method based on HPD (Hot Plug Detection) detection, which comprises the following steps of: manually pulling down an HPD pin by utilizing a Hot Plug Detection (HPD) function in a DVI (Digital Video Interface) transmission protocol, so that a seat computer cannot detect an external display, and actively closing a DVI channel; when the display is switched to the channel, the HPD pin is released, the seat computer detects that the display is mounted again, and extended display is automatically completed; according to the method and the device, mouse overflow in a complex display scene can be prevented.