A video quality assessment method and device are provided. The video quality assessment method includes: obtaining a to-be-assessed video, where the to-be-assessed video includes a forward error correction (FEC) redundancy data packet; when a quantity of lost data packets of a first source block in the to-be-assessed video is less than or equal to a quantity of FEC redundancy data packets of the first source block, generating a first summary packet for a non-lost data packet of the first source block, and generating a second summary packet for a lost data packet of the first source block; and calculating a mean opinion score of video (MOSV) of the to-be-assessed video based on the first summary packet and the second summary packet. The MOSV calculated according to the method is more consistent with real video experience of a user, so accuracy of video quality assessment can be improved.

A message sending method and device, and a code stream processing method and device are provided. In the message sending method, a first server acquires and caches a code stream which is the same as a code stream of a second server; the first server acquires an initial position for sending the code stream; and after the second server stops sending the code stream, the first server constructs a message corresponding to the code stream, and sends the message starting from the initial position according to a source Internet Protocol (IP) address of the second server.

System, method, and computer program product embodiments are disclosed for integrated diagnosis and debugging of content distribution systems. A system includes a networking module that receives, from a central server, instructions for running network diagnostics on a cable headend. A diagnostics environment module is configured to perform diagnostic operations based on the received instructions. The networking module transmits results of the diagnostic operations to the central server.

Aspects of the subject disclosure may include, for example, a method for providing redundancy in a video data stream. For every data frame of a plurality of data frames of video content, the method includes dividing the data frame into a plurality of data segments and copying a plurality of each of the plurality of data segments to the plurality of data frames in a data stream to provide redundancy for the data frame within the plurality of data frames in the data stream. The plurality of each of the plurality of data segments is distributed across the plurality of data frames to provide generate a plurality of redundancy-enhanced data frames that provide the redundancy over a protection interval associated with a network path. The method includes transmitting a data stream comprising the plurality of redundancy-enhanced data frames to a receiver via the network path. Other embodiments are disclosed.

Systems and methods for broadcasting a video stream are disclosed. The systems and methods can receive a video stream from a broadcaster, process the video steam, store the video streaming, and deliver the video stream to a viewer as a live video stream or a video on demand. The viewer may use an access token to access the video stream. The systems and methods may include an error detection mechanism for detecting an interrupt in the video stream. The systems and methods can restore the access token to its original state if an error is detected. The systems and methods can also include one or more link sharing mechanisms for sharing links to a video stream. The shareable links may be associated with share tokens.

Provided are a method and a device for transmitting and receiving multimedia data. The present invention comprises: receiving of multimedia data and confirming of loss data; determining, with respect to the degree of the loss of the received data, of whether or not the lost data can be recovered by means of application layer forward error correction (AL-FEC); if data recovery by means of the AL-FEC is not possible, making of an automatic retransmission request (ARQ) with respect to the lost data; and receiving of data retransmitted with respect to the ARQ and recovering of the lost data.

A system and method for selectively utilizing an over-the-air broadcast source to provide low-latency content as an alternative to conventional over-the-top sourced content. The disclosed technology can provide automatic switching to an available low-latency content source, or switch to a low-latency source only after a user affirmatively elects such. The system and method are implemented utilizing standard premises equipment, and enable the insertion of regional commercial messages into the low-latency content stream prior to viewing.

A fault detection method includes: obtaining a video quality parameter of a monitored video stream, where the video quality parameter is determined according to a packet loss recovery method of the monitored video stream, the video quality parameter includes an effective packet loss factor, and the effective packet loss factor is used to indicate effectiveness of network packet loss recovery performed by using the packet loss recovery method of the monitored video stream; and performing fault detection based on the video quality parameter of the monitored video stream.

Disclosed herein are techniques for bidirectional communication in a network, such as a cable television (CATV) system, for return band with echo cancellation. The techniques result in a minimum loss of available return bandwidth to facilitate forward out of band (OOB) communication to a client device, e.g., set top box (STB), within the extended return band, such as a return band extended beyond a frequency previously used for OOB communications.

Systems and methods for broadcasting a video stream are disclosed. The systems and methods can receive a video stream from a broadcaster, process the video steam, store the video streaming, and deliver the video stream to a viewer as a live video stream or a video on demand. The viewer may use an access token to access the video stream. The systems and methods may include an error detection mechanism for detecting an interrupt in the video stream. The systems and methods can restore the access token to its original state if an error is detected. The systems and methods can also include one or more link sharing mechanisms for sharing links to a video stream. The shareable links may be associated with share tokens.