Real-time video/audio quality adjustment method
AssigneeLeadtek Research Inc.
InventorMeng-Hsien Liu
Life of this patent
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Abstract
A method for transmitting audio and visual data over a communication means. If the bandwidth over a communication means drops below a predetermined level a video conference system can begin transmitting visual data in a QCIF format, another system receiving the data and scaling the data from the QCIF format to a CIF format. In another embodiment of the invention if the bandwidth drops below a first or second predetermined level the audio format can be altered to lower the bandwidth requirements accordingly. In a third embodiment the methods for lowering the utilized bandwidth of the audio and visual data can be used in conjunction with each other.
Claims14
A method of transmitting audio/visual data comprising the steps of:
- monitoring the available bandwidth on a communications means during data transmission;
- transmitting visual data in CIF format if the bandwidth is equal to or greater than a first predetermined level;
- transmitting visual data in QCIF format when the arailable bandwidth drops below a predetermined level;
- receiving the visual data in QCIF format and scaling the visual data back into a CIF format.
A method of transmitting audio/visual data comprising the steps of:
- monitoring the available bandwidth on a communications means during data transmission;
- transmitting audio data in G.711 format if the bandwidth is equal to or greater than a first predetermined level;
- transmitting audio data in G.728 format if the bandwidth drops below a first predetermined level;
- transmitting audio data in G.723 format if the bandwidth drops below a second predetermined level.
A method of transmitting audio/visual data comprising the steps of:
- monitoring the available bandwidth on a communications means during data transmission;
- transmitting audio data in a first format if the bandwidth is equal to or greater than a first predetermined level;
- transmitting audio data in a second format if the bandwidth drops below a first predetermined level;
- and
- transmitting audio data in a third format if the bandwidth drops below a second predetermined level.
A method of transmitting audio/visual data, comprising the steps of:
- detecting a drop in bandwidth data transmission;
- and
- lowering the amount of bandwidth utilized by the audio data in order to preserve video quality;
- wherein lowering the amount of bandwidth utilized by the audio data comprises the steps of:
- monitoring the available bandwidth on a communications means during data transmission;
- transmitting audio data in G.711 format if the bandwidth is equal to or greater than a first predetermined level;
- transmitting audio data in G.728 format if the bandwidth drops below a first predetermined level;
- transmitting audio data in G.723 format if the bandwidth drops below a second predetermined level.
A method of transmitting audio/visual data comprising the steps of:
- monitoring the available bandwidth on a communications means during data transmission;
- transmitting visual data in a first format if the bandwidth is equal to or greater than a first predetermined level;
- transmitting visual data in a second format with a reduced bandwidth when the available bandwidth drops below a predetermined level;
- and
- receiving the visual data the second format and scaling the visual data back into the first format.
Dependencies are inferred from the claim text.