A device for generating a speech video according to an embodiment has one or more processor and a memory storing one or more programs executable by the one or more processors, and the device includes a video part generator configured to receive a person background image of a person and generate a video part of a speech video of the person; and an audio part generator configured to receive text, generate an audio part of the speech video of the person, and provide speech-related information occurring during the generation of the audio part to the video part generator.

A control signal transmission circuit and a control signal receiving circuit for an audio/video interface are provided. The control signal transmission circuit includes an audio/video interface encoder, a signal packaging circuit and a data allocator. The audio/video interface encoder is configured to receive an audio packet and supports a user-defined packet format. The signal packaging circuit is configured to receive a first control signal and package the first control signal into a control data packet according to the user-defined packet format. The data allocator is configured to receive a video data and a second control signal and to mix the second control signal and the video data to generate a mixed data packet. The audio/video interface encoder packages the control data packet, the mixed data packet and the audio packet according to an audio/video transmission protocol to generate an audio/video and control data.

A control signal transmission circuit and a control signal receiving circuit for an audio/video interface are provided. The control signal transmission circuit includes an audio/video interface encoder, a signal packaging circuit and a data allocator. The audio/video interface encoder is configured to receive an audio packet and supports a user-defined packet format. The signal packaging circuit is configured to receive a first control signal and package the first control signal into a control data packet according to the user-defined packet format. The data allocator is configured to receive a video data and a second control signal and to mix the second control signal and the video data to generate a mixed data packet. The audio/video interface encoder packages the control data packet, the mixed data packet and the audio packet according to an audio/video transmission protocol to generate an audio/video and control data.

A video receiver apparatus, for receiving video from a video transmitter apparatus, comprises: a memory portion for memorizing receiver apparatus information of the video receiver apparatus; and a transmitter/receiver portion for receiving a request for obtaining the receiver apparatus information transmitted from the video transmitter apparatus, and also for transmitting the receiver apparatus information memorized in the memory portion responding to the obtaining request, and wherein, further within the memory portion is memorized history information, changing depending on alternation of the receiver apparatus information, and wherein the receiver portion is able to receive the history information, which the video transmitter apparatus holds therein, as well as, the obtaining request from the video transmitter, and when the received history information from the video transmitter apparatus and the history information, which the video transmitter apparatus holds therein, are inconsistent with each other, then the receiver apparatus information memorized in the memory portion is transmitted to the video transmitter apparatus.

A video receiver apparatus, for receiving video from a video transmitter apparatus, comprises: a memory portion for memorizing receiver apparatus information of the video receiver apparatus; and a transmitter/receiver portion for receiving a request for obtaining the receiver apparatus information transmitted from the video transmitter apparatus, and also for transmitting the receiver apparatus information memorized in the memory portion responding to the obtaining request, and wherein, further within the memory portion is memorized history information, changing depending on alternation of the receiver apparatus information, and wherein the receiver portion is able to receive the history information, which the video transmitter apparatus holds therein, as well as, the obtaining request from the video transmitter, and when the received history information from the video transmitter apparatus and the history information, which the video transmitter apparatus holds therein, are inconsistent with each other, then the receiver apparatus information memorized in the memory portion is transmitted to the video transmitter apparatus.

Provided herein are various embodiments for synchronizing playback of audio and video. An embodiment operates by determining that a first quality video is being received at a media device. It is determined that a buffer of the media device is not large enough to buffer the first quality video long enough to synchronize an output of the high quality video with the output of the audio by one or more wireless speakers. A second quality of the video that the buffer can hold long enough to synchronize is identified, wherein the second quality of the video is lower than the first quality of the video. The media device outputs the video at the second quality and the corresponding audio to the one or more wireless speakers.

Provided herein are various embodiments for synchronizing playback of audio and video. An embodiment operates by determining that a first quality video is being received at a media device. It is determined that a buffer of the media device is not large enough to buffer the first quality video long enough to synchronize an output of the high quality video with the output of the audio by one or more wireless speakers. A second quality of the video that the buffer can hold long enough to synchronize is identified, wherein the second quality of the video is lower than the first quality of the video. The media device outputs the video at the second quality and the corresponding audio to the one or more wireless speakers.

The present disclosure provides a data transmission method of a system in an IP based broadcasting network, the data transmission method comprising the steps of: generating an MPEG media transport protocol (MMTP) packet using a media processing unit (MPU) for a service; generating an IP packet using the MMTP packet; generating a layer 2 (L2) packet using the IP packet and generating a layer 1 (L1) packet stream using the L2 packet; and transmitting the L1 packet stream, wherein absolute time information of the system is included in one of a transmission frame of the L1 packet stream and the L2 packet.

The present disclosure provides a data transmission method of a system in an IP based broadcasting network, the data transmission method comprising the steps of: generating an MPEG media transport protocol (MMTP) packet using a media processing unit (MPU) for a service; generating an IP packet using the MMTP packet; generating a layer 2 (L2) packet using the IP packet and generating a layer 1 (L1) packet stream using the L2 packet; and transmitting the L1 packet stream, wherein absolute time information of the system is included in one of a transmission frame of the L1 packet stream and the L2 packet.

Systems and methods of the present disclosure provide for dynamic delay equalization of related media signals in a media transport system. Methods include receiving a plurality of related media signals, transporting the related media signals along different media paths, calculating uncorrected propagation delays for the media paths, and delaying each of the related media signals by an amount related to the difference between the longest propagation delay (of the uncorrected propagation delays) and the uncorrected propagation delay of the related media signal/media path. Calculating the uncorrected propagation delays and delaying the related media signals may be performed in response to a change to the propagation delay of at least one of the related media signals/media paths. Additionally or alternatively, calculating the uncorrected propagation delays and delaying the related media signals may be performed while transporting the related media signals.