EP0724362A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Priority controlled transmission of multimedia streams via a telecommunication line
Assignee: International Business Machines Corp
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Filing: 1995-01-30
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Granted: —
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Expires: 2015-01-30
Abstract
Abstract Disclosed are a method, a system and a device for the transmission of multimedia streams via telecommunication lines. Especially, the disclosure relates to information transfer in video or audio teleconferences. Known solutions are designed for handling only small groups of participants and the control of those systems requires a lot of human interaction. The invention solves these problems especially by providing a scale of priorities for active transmission of the streams, wherein the priority status of each stream is changed dynamically with respect to attributes of substreams of the multimedia streams. Only the streams with the highest priority levels are actively transmitted.
Inventors
- 👤 Boris Kownatzki
- 👤 Jochen Sandvoss
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 02:04
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/14; H04N7/15; H04N7/152
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
99 words
A method for the transmission of multimedia streams via at least one telecommunication line, the multimedia streams comprising at least two substreams, wherein one kind of substreams comprises an attribute controlling the priority for active transmission of one or more streams in respect of the other streams; wherein continuously detecting changes of the attributes of those substreams; wherein providing a scale of priorities for the active transmission of streams; wherein dynamically changing the priority status of each stream according to the change of at least one attribute; and wherein actively transmitting only the stream(s) with the highest priority level(s).
Claim 2
Dependent Claim
71 words
Method according to claim 1, wherein the priorities of the streams are determined by a weighting function G norm ( s i , t )= A ( s i ) 1 + loud ( s i , A ( s i )) loud max comprising the amplitude loud(s i ,t) of an audio substream and a parameter A(s i ) which describes the last time when a stream has been active.
Claim 3
Dependent Claim
23 words
Method according to claim 1 and/or 2, wherein the user is specifying the maximum number of streams which can be active in parallel.
Claim 4
Dependent Claim
29 words
Method according to one or more of claims 1 to 3, wherein being applied at the sender site, exclusively at the receiver site or at an intermediate control system.
Claim 5
Dependent Claim
111 words
A speech controlled video conferencing system transferring video/audio/data multimedia streams via a telecommunication line according to one or more of the preceding claims, comprising: speech detection means for detecting the amplitudes of the audio substreams and for deciding which of the multimedia streams are set into the states active or passive; means for assigning each multimedia stream a priority for active transmission and setting up a scale of priorities for the priorities of the multimedia streams; means for dynamically changing the scale of priorities with regard to changes of the amplitudes of the audio substreams; and means for setting at least one multimedia stream into an active status for the transmission.
Claim 6
Dependent Claim
20 words
Video conferencing system according to claim 5, further comprising generation means for generating a weighting function as in claim 2.
Claim 7
Dependent Claim
79 words
Video conferencing system according to claim 5 and/or 6, further comprising detection means for detecting the amplitude of the audio substreams and for setting multimedia streams into an active status whose audio substream exceeds a certain threshold for a defined time interval; and detection means for detecting the periods of time for quiet audio substreams and for setting multimedia streams into a passive status whose audio substreams have been quiet for a time period longer than a certain threshold.
Claim 8
Dependent Claim
45 words
A speech controlled data transfer device for sharing the bandwidth of a single telecommunication line between speech and data streams, comprising detection means for recognizing periods of silence of speech and multiplexor means for timely multiplexing data and speech with regard to periods of silence.
Claim 9
Dependent Claim
36 words
Device according to claim 8, whereby the periods of silence recognizing and the multiplexing means connects a telephone to the telecommunication line during periods of speech and a modem to the line during periods of silence.
Claim 10
Dependent Claim
27 words
Device according to claim 8 and/or 9, whereby the periods of silence recognizing and the multiplexing means are disposed at the sender site and/or the receiver site.
Claim 11
Dependent Claim
62 words
Device according to one or more of claims 9 to 11, comprising: conversion means for a 2-wire to 4-wire conversion at a phone input and a modem input; period of silence recognition means and control signal generation means (PSR); recognition means for speech/data recognition of the incoming traffic (SDR); and switching means for a fast switching between phone input/output and modem input/output.
References Cited (Backward Citations)
WO1983003512A1
Cited
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