EP0498649A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Communication apparatus
Assignee: Canon Inc
•
Filing: 1992-02-06
•
Granted: —
•
Expires: 2012-02-06
Abstract
Abstract Disclosed is a communication apparatus in which coding and/or decoding parameters for coding and/or decoding data can be performed in dialog fashion to make possible the optimum coding of transmitted data and the optimum reproduction of received data. The apparatus includes a coefficient adjusting unit for adjusting coding and/or decoding parameters, and a decode-signal changeover unit for selecting, as an input signal to be decoded, one of a reception signal that has been received through a line and a transmission signal that has been coded, wherein the parameters are adjusted based upon the coded transmission signal. The apparatus further includes an image synthesizing unit for simultaneously displaying an input signal from input means and a decoded signal.
Inventors
- 👤 Hitoshi c/o Canon K.K. Yasuda
- 👤 Makoto c/o Canon K.K. Chida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 18:51
CPC Classifications
H; H04; H04N; H04N19/00; H04N19/10; H04N19/134; H04N19/154; H04N19/60; H04N19/61; H04N19/80; H04N19/82; H04N7/00; H04N7/14; H04N7/141; H04N7/148; H04N7/24
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
60 words
A communication apparatus comprising: coefficient adjusting means for adjusting coding and/or decoding parameters; and decode-signal changeover means for selecting, as an input signal to be decoded, one of a reception signal that has been received through a line and a transmission signal that has been coded; wherein the parameters are adjusted based upon the transmission signal that has been coded.
Claim 2
Dependent Claim
24 words
The apparatus according to claim 1, further comprising image synthesizing means for simultaneously displaying an input signal from input means and a decoded signal.
Claim 3
Dependent Claim
81 words
The apparatus according to claim 1, wherein said signal is an image signal, said communication apparatus comprising: image coefficient adjusting means for adjusting coding and/or decoding parameters in order to change picture quality; and decode-signal changeover means for selecting, as an input signal to be decoded, one of a reception image that has been received through a line and a transmission image that has been coded; wherein the picture quality is adjusted based upon the transmission picture that has been coded.
Claim 4
Dependent Claim
25 words
The apparatus according to claim 3, further comprising image synthesizing means for simultaneously displaying an input image from image input means and a decoded image.
Claim 5
Dependent Claim
24 words
The apparatus according to claim 3, wherein adjustment of the image includes adjusting picture quality based upon the image after it has been decoded.
Claim 6
Dependent Claim
79 words
The apparatus according to claim 1, wherein said signal is an audio signal, said communication apparatus comprising: audio coefficient adjusting means for adjusting coding and/or decoding parameters in order to change sound quality; and decode-signal changeover means for selecting, as an input signal to be decoded, one of reception audio that has been received through a line and transmission audio that has been coded; wherein the sound quality is adjusted based upon the transmission audio that has been coded.
Claim 7
Dependent Claim
33 words
The apparatus according to claim 6, further comprising: converting means for converting audio into a corresponding image; and image synthesizing means for simultaneously displaying input audio from converted-audio input means and decoded audio.
Claim 8
Dependent Claim
51 words
A communication apparatus comprising: communication means for performing bidirectional image communication with other parties; compression means for compressing image data to be transmitted to said other parties; and means for instructing said compression means to change compression characteristic of said compression means while the bidirectional image communication by said communication means.
Claim 9
Dependent Claim
20 words
The apparatus according to claim 8, further comprising monitoring means for monitoring the image data compressed by said compression means.
Claim 10
Dependent Claim
22 words
The apparatus according to claim 8, further comprising reproducning means for reproducing image data received from the other parties as visible image.
Claim 11
Dependent Claim
13 words
The apparatus according to claim 10, wherein said reproducing means comprises a monitor.
Claim 12
Dependent Claim
19 words
The apparatus according to claim 8, further comprising audio communication means for performing audio communication with the other party.
Claim 13
Dependent Claim
39 words
The apparatus according to claim 9, wherein said monitoring means includes: expanding means for expanding image data compressed by said compression means; and first reproducing means for reproducing the image data expanded by said expanding means as visible image.
Claim 14
Dependent Claim
23 words
The apparatus according to claim 13, further comprising second reproducing means for reproducing image data received from the other parties as visible image.
Claim 15
Dependent Claim
23 words
The apparatus according to claim 14, wherein are reproduce means is used both as said first reproducing means and said second reproducing means.
Claim 16
Dependent Claim
70 words
A communication apparatus comprising: communication means for transmitting image data bidirectionally with other parties; a monitor for displaying image transmitted from the other parties by said communication means and image data to be transmitted to the other parties simultaneously; processing means for processing image data to be transmitted to the other parties; and designation means for designating a processing state at said processing means while said monitor displays the images.
Claim 17
Dependent Claim
13 words
The apparatus according to claim 16, wherein said processing means comprise compressing means.
Claim 18
Dependent Claim
17 words
The apparatus according to claim 17, wherein said designation means designates compression state at said compressing means.
Claim 19
Dependent Claim
13 words
The apparatus according to claim 17, wherein said compression means performs irreversible compression.
Claim 20
Dependent Claim
13 words
The apparatus according to claim 8, wherein said compression means performs irreversible compression.
Claim 21
Independent Claim
48 words
An apparatus or method for transmitting a video signal, comprising means (6) for compressing a video output signal for transmission and monitoring means arranged to view an output image prior to compression in combination with a compressed version of said image to facilitate optimum adjustment of compression parameters.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.