Cavium, Inc.

Marvell Asia Pte., Ltd.

Gorka Garcia

Alberto Duenas

Francisco J Roncero Izquierdo

Nguyen Nguyen

Farhad Mighani

One aspect of the present invention discloses a network system capable of transmitting and processing audio video ('A/V') data with enhanced quality of service ('QoS'). The network system includes a transmitter, a transmission channel, an adjustable decoder buffer, and a decoder. The transmitter contains an encoder able to encode A/V data in accordance with encoding bit rate recommendation from SQoS and packets loss notifications. The transmission channel, in one example, transmits A/V data from the transmitter or the receiver. The adjustable decoder buffer, in one aspect, is able to change its storage capacity or buffering size in response to the adaptive latency estimate. Upon fetching at least a portion of the A/V data from the adjustable decoder buffer, SQoS updates the adaptive latency estimate based on the quality of the decoded A/V data.

Method and apparatus for providing a low latency transmission system using adjustable buffers

Systems and methods for transmitting a multimedia stream over a communication link on a network are disclosed. The systems and methods adaptively adjust encoding parameters based on monitoring changing conditions of the network. A transmitter includes an adaptive-rate encoder that adaptively adjusts a video encoding bit rate in response to changing conditions of the communication link. The encoder maintains tight rate control by utilizing slice processing and sub-frame rate adaptation, as well as maintaining a headroom between the channel bit rate and the video encoding bit rate. The adaptive-rate encoder also embeds intra-frame constraints in predictive frames traffic in order to reduce latency.

System and method for low-latency multimedia streaming

An encoder within a video transmission system controls the bit allocation at a sub-frame level. A frame is divided into smaller blocks, known as rate control blocks. Rate control blocks are used as the basic unit for bit allocation. This bit allocation achieves the target bit rate desired by the system as well as meet latency constraints. The encoder uses the slice partitioning capabilities to generate the rate control blocks using one or more slices of the image frame. This feature allows the decoder to decode the rate control blocks independently and ensures that the encoded data size for each rate control block is allocated. The encoder also detects the overflow condition for the buffer and performing an operation to avoid the overflow condition based on whether the image frame is an inter-frame or an intra-frame.

Low latency rate control system and method

A video transmission system includes an encoder and a decoder. Data may be lost during video encoding and transmission, which leads to errors in reconstructing the video images by the decoder. A return channel couples the encoder and decoder so that errors detected by the decoder are made available to the encoder. Depending on the percentage of the image not received, refresh operations are performed. An on-demand intra-refresh operation is done when the percentage of the image needed to be refreshed is below a specified level. A random intra-refresh operation is done when the percentage of the image needed to be refreshed exceeds the level.

On-demand intra-refresh for end-to end coded video transmission systems

An encoder within a video transmission system controls the bit allocation at a sub-frame level. A frame is divided into smaller blocks, known as rate control blocks. Rate control blocks are used as the basic unit for bit allocation. This bit allocation achieves the target bit rate desired by the system as well as meet latency constraints. The encoder uses the slice partitioning capabilities to generate the rate control blocks using one or more slices of the image frame. This feature allows the decoder to decode the rate control blocks independently and ensures that the encoded data size for each rate control block is allocated. The encoder also detects the overflow condition for the buffer and performing an operation to avoid the overflow condition based on whether the image frame is an inter-frame or a intra-frame.

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Madrid, Spain

Gorka Garcia