Audio and video data processing device for multimedia communication via a local network set up within an asynchronous network
First Claim
1. Audio and video data processing device (D1) for multimedia communication (L3-1, L3-2), via an asynchronous network (N) with random transmission times, between, on the one hand, a first pair consisting of a first audio communication terminal (TM1) and a first video communication terminal (PC1), and on the other hand, a second pair consisting of a second audio communication terminal (TM2) and a second video communication terminal (PC2), the said terminals (TMi, PCi) being all of the LAN type, where at least the first pair (TM1, PC1) consists of independent and asynchronous terminals, characterized in that it includes, in association with this first pair, connection means (ML1) for the setting up of:
- a video link (L2) between these connection means (ML1) and the video terminal (PC1) of the first pair, an audio link (L1) between these connection means (ML1) and the audio terminal (TM1) of the first pair, a video link (L3-2) between these connection means (ML1) and the second pair (TM2, PC2), an audio link (L3-1) between these connection means (ML1) and the second pair (TM2, PC2).
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Accused Products
Abstract
A device (D1) is dedicated to the processing of audio and video data for multimedia communication, via an asynchronous network, between first LAN audio (TM1) and video (PC1) terminals and second LAN audio (TM2) and video (PC2) terminals. This device includes i) connection means (ML1) to establish communications with the first LAN audio and video terminals and with other connection means (ML2) installed in another device (D2), ii) first dating means (MD1) to attach a transmit time mark and an identifier to the audio and video data emitted by the first LAN audio (TM1) and video (PC1) terminals, before their transmission to the other connection means (ML2), and to attach a receive time mark to audio and video data emitted by the other connection means (ML2) and containing an identifier and a transmit time mark, and iii) processing means (MT1) to determine a time difference representing the transmission time difference between the received audio and video data and presenting the same identifier, from their transmit and receive time marks, and to delay, by a value representing this time difference, the transmission of the received audio data to the first LAN audio terminal (TM1) in relation to that of the received video data to the first LAN video terminal (PC1).
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Citations
13 Claims
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1. Audio and video data processing device (D1) for multimedia communication (L3-1, L3-2), via an asynchronous network (N) with random transmission times, between, on the one hand, a first pair consisting of a first audio communication terminal (TM1) and a first video communication terminal (PC1), and on the other hand, a second pair consisting of a second audio communication terminal (TM2) and a second video communication terminal (PC2), the said terminals (TMi, PCi) being all of the LAN type, where at least the first pair (TM1, PC1) consists of independent and asynchronous terminals, characterized in that it includes, in association with this first pair, connection means (ML1) for the setting up of:
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a video link (L2) between these connection means (ML1) and the video terminal (PC1) of the first pair, an audio link (L1) between these connection means (ML1) and the audio terminal (TM1) of the first pair, a video link (L3-2) between these connection means (ML1) and the second pair (TM2, PC2), an audio link (L3-1) between these connection means (ML1) and the second pair (TM2, PC2). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 13)
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9. Device according to claim 9, characterized in that the said priority level associated with the said video data is lower than the said priority level associated with the said audio data.
Specification