Comcast Cable Communications, LLC

Ali C Begen

Alexander Giladi

Yasser Fouad Syed

Dan Grois

Alexander Balk

Johnathon Benton

Client devices in a content delivery network may send requests for content to upstream devices along with one or more parameters that indicate, as an example, client-device-related conditions or constraints, such as available buffer space or buffer starvation time. These parameters may be used by the upstream devices to prioritize content requests according to a prioritization schedule to ensure requested content is timely delivered to the appropriate client device(s) at the appropriate time to prevent playback failure, stalls, etc.

Methods, systems, and apparatuses to mitigate server-associated delays in content delivery

An encoder (e.g., a Versatile Video Coding (VVC) encoder, etc.) may make real-time encoding decisions to vary a bitrate of a content item (e.g., high-resolution video, streaming content, a movie, a show/program, etc.) by upsampling and/or downsampling portions (e.g., frames/slices, group of pictures (GOP), coding units (CU), coding tree units (CTU), etc.) based on a cost function that utilizes a versatile Lagrangian multiplier (denoted as λto denote the versatility). The versatile Lagrangian multiplier may not only account for the effects of quantization (e.g., a quantization parameter (QP), etc.) on portions of the content item, instead, the versatile Lagrangian multiplier may also be based on adjustment parameters associated with content resolution and/or playback quality of experience (QoE). The versatile Lagrangian multiplier enables a substantial decrease in transmission bitrate for portions of a content item without reducing the visual presentation quality and keeping an end-user quality of experience (QoE) at an optimal level.

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Ali C Begen