Patent EP0599825A2 successfully refreshed from Google Patents.
EP0599825A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Digital transmission system for transmitting an additional signal such as a surround signal
Assignee: Koninklijke Philips NV
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Filing: 1990-05-29
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Granted: —
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Expires: 2010-05-29
Abstract
Abstract The invention enables an additional signal, such as a surround signal, to be transmitted together with a first and a second signal component, such that it can be retrieved upon reception.
Inventors
- 👤 Gerardus Cornelis Petrus Lokhoff
- 👤 Yves François Déhery
- 👤 Gerhard Stoll
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 14:38
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/28; H04H; H04H20/00; H04H20/86; H04H20/88; G; G10; G10L; G10L19/00; G10L19/008; G10L19/02; G10L19/0204; G10L19/0208; G11; G11B; G11B20/00; G11B20/00007; G11B20/10; G11B20/10527; G11B20/12; G11B20/18; G11B20/1833; G11B27/00; G11B27/10; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; H04B; H04B1/00; H04B1/66; H04B1/665; H04B1/667; H04H20/28; H04H20/30; H04H20/44; H04H20/46; H04H20/47; H04H20/89; H04H20/95; H04H40/00; H04H40/18; H04H40/27; H04H40/36; H04H60/00; H04H60/02; H04H60/07; H04H60/09; H04H60/13; G11B20/00086; G11B20/00992; G11B2020/10537; G11B2020/10592; G11B2020/10601; G11B2220/00; G11B2220/90; G11B2220/91; G11B2220/913; G11B2220/93; H04H20/31; H04H60/14; H04H60/18
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
213 words
Digital transmission system having a transmitter and a receiver, for transmitting a wide-band digital audio signal comprising at least a first and a second audio signal component via a transmission medium, the transmitter comprising an encoder having analysis filter means for filtering the signal components so as to obtain a number of n sub signals for each of the at least two signal components, data reducing means for carrying out a data reduction step on the n sub signals of each of the at least two signal components, transmission means for transmitting data reduced sub signals via the transmission medium, the receiver comprising receiving means for receiving the data reduced sub signals, data expansion means for carrying out a data expansion step on the received data reduced sub signals so as to obtain non-data reduced replicas of the sub signals, and a decoder having synthesis filter means for combining sub signals for each of the at least two signal components so as to obtain a replica of the at least first and second signal components, characterized in that the transmitter is further adapted to transmit at least a first auxiliary digital signal component, the receiver further comprising derivation means for deriving said at least one auxiliary digital signal component from the signal received.
Claim 2
Dependent Claim
86 words
Digital transmission system as claimed in claim 1, characterized in that the analysis filter means in the transmitter are further adapted to filter the at least one auxiliary signal component so as to obtain a number of n sub signals for each of said at least one auxiliary signal components, the synthesis filter means in the receiver being further adapted to combine sub signals of the at least one auxiliary signal component so as to obtain a replica of the at least one auxiliary signal components.
Claim 3
Dependent Claim
94 words
Digital transmission system as claimed in claim 1, characterized in that the data reducing means in the transmitter being further adapted to carry out a data reduction step on the at least one auxiliary digital signal component, so as to obtain a data reduced version of the auxiliary digital signal component, the data expansion means in the receiver being further adapted to carry out a data expansion step on the received data reduced version of the auxiliary digital signal component so as to obtain a non-data reduced version of said auxiliary digital signal component
Claim 4
Dependent Claim
206 words
Digital transmission system having a transmitter and a receiver, for transmitting a wide-band digital audio signal comprising at least a first and a second signal component via a transmission medium, the transmitter comprising an encoder having analysis filter means for filtering the signal components so as to obtain a number of n subband signals for each of the at least two signal components, data reducing means for carrying out a data reduction step on the n subband signals of each of the at least two signal components, transmission means for transmitting subband signals via the transmission medium, the receiver comprising receiving means for receiving subband signals, data expansion means for carrying out a data expansion step on the received data reduced subband signals so as to obtain non-data reduced replicas of the subband signals, and a decoder having synthesis filter means for combining subband signals for each of the at least two signal components so as to obtain a replica of the at least first and second signal components, characterized in that the transmitter is further adapted to transmit at least a first auxiliary digital signal component, the receiver further comprising derivation means for deriving said at least one auxiliary digital signal from the signal received.
Claim 5
Dependent Claim
86 words
Digital transmission system as claimed in claim 4, characterized in that the analysis filter means in the transmitter are further adapted to filter the at least one auxiliary signal component so as to obtain a number of n subband signals for each of said at least one auxiliary signal components, the synthesis filter means in the receiver being further adapted to combine subband signals of the at least one auxiliary signal component so as to obtain a replica of the at least one auxiliary signal component.
Claim 6
Dependent Claim
94 words
Digital transmission system as claimed in claim 4, characterized in that the data reducing means in the transmitter being further adapted to carry out a data reduction step on the at least one auxiliary digital signal component, so as to obtain a data reduced version of the auxiliary digital signal component, the data expansion means in the receiver being further adapted to carry out a data expansion step on the received data reduced version of the auxiliary digital signal component so as to obtain a non-data reduced version of said auxiliary digital signal component.
Claim 7
Dependent Claim
92 words
Digital transmission system as claimed in claim 1 or 4, characterized in that the transmitter comprises a control signal generator means for generating a signal type control signal indicating the type of said at least one auxiliary digital signal component, the transmitter further being adapted to transmit said signal type control signal, the receiver further comprising detection means for detecting said signal type control signal, the derivation means being adapted to derive, in response to said signal type control signal, said at least one auxiliary digital signal component from the signal received.
Claim 8
Dependent Claim
94 words
Digital transmission system as claimed in claim 1 or 4, characterized in that the transmitter comprises a control signal generator means for generating a signal presence control signal indicating the presence or absence of said at least one auxiliary digital signal component, the transmitter further being adapted to transmit said signal presence control signal, the receiver further comprising detection means for detecting said signal type control signal, the derivation means being adapted to derive, in response to said signal presence control signal, said at least one auxiliary digital signal component from the signal received.
Claim 9
Dependent Claim
28 words
Digital transmission system as claimed in claim 1 or 4, characterized in that, the at least one auxiliary digital signal component is a third digital audio signal component.
Claim 10
Dependent Claim
94 words
Digital transmission system as claimed in claim 9, characterized in that, the transmitter is adapted to transmit a first and a second auxiliary digital signal component in the form of a third and a fourth digital audio signal component respectively, that the control signal generator means is adapted to generate a signal type control signal indicating the type of said third and fourth digital audio signal components, the derivation means being adapted to derive, in response to said signal type control signal, said third and fourth digital audio signal component from the signal received.
Claim 11
Dependent Claim
29 words
Digital transmission system as claimed in claim 10, characterized in that the first, second, third and fourth digital signal component are the four components of a surround-sound audio signal.
Claim 12
Dependent Claim
79 words
Digital transmission system as claimed in any one of the preceding claims, the transmitter further comprising formatting means for combining the data reduced signal components into a second digital signal and for supplying the second digital signal at an output, the second digital signal comprising consecutive frames, characterized in that a frame comprises first, second and third frame portions, the first frame portion comprising synchronization information and system information and the second and third frame portions comprising signal information.
Claim 13
Dependent Claim
92 words
Digital transmission system as claimed in claim 12, the data reducing means comprising means for quantizing the respective sub signals so as to obtain quantized sub signals for each of the at least two audio signal components, characterized in that the second frame portion of a frame contains allocation information which, for at least a number of subsignals, indicates the number of bits representing the samples of the quantised subsignals derived from said subsignals, and in that the third frame portion contains the samples of at least said quantised subsignals (if present).
Claim 14
Dependent Claim
94 words
Digital transmission system as claimed in claim 13, where the sub signals are in the form of subband signals, and the quatization means are adapted to quantize the subband signals into quantized subband signals, characterized in that for at least a number of the subband signals the allocation information in the second frame portion of a frame specifies the number of bits representing the samples of the quantised subband signals derived from said subband signals, and in that the third frame portion contains the samples of at least said quantised subband signals (if present).
Claim 15
Dependent Claim
62 words
Digital transmission system as claimed in claim 14, characterized in that in addition the third frame portion includes information related to scale factors, a scale factor being associated with at least one of the quatised subband signals contained in the third frame portion, and in that the scale factor information is included in the third frame portion before the quantised subband signals.
Claim 16
Dependent Claim
50 words
Digital transmission system as claimed in claim 14 or 15, characterized in that the samples of the subband signals (if present) are inserted in the third frame portion in a sequence corresponding to the sequence in which said samples are applied to the synthesis-filter means upon reception in the receiver.
Claim 17
Dependent Claim
29 words
Digital transmission system as claimed in anyone of the claims 12 to 16, characterized in that the third frame portion of the frames comprise the signal type control signal.
Claim 18
Dependent Claim
36 words
Digital transmission system as claimed in claim 17, characterized in that the signal type control signal is stored in the third frame portion, after the samples of the at least first and second audio signal components.
Claim 19
Dependent Claim
32 words
Digital transmission system as claimed in anyone of the claims 12 to 17, characterized in that samples of the at least one auxiliary signal component are stored in the third frame portion.
Claim 20
Dependent Claim
41 words
Digital transmission system as claimed in claim 19, characterized in that the samples of the at least one auxiliary signal component are stored in the third frame portion after the samples of the at least first and second audio signal components.
Claim 21
Dependent Claim
30 words
Digital transmission system as claimed in claim 19 or 20, characterized in that the third frame portion also includes a scale factor for the at least one auxiliary signal component.
Claim 22
Dependent Claim
30 words
Digital transmission system as claimed in claim 19 or 20, characterized in that the third frame portion also includes bit allocation information for the at least one auxiliary signal component.
Claim 23
Dependent Claim
15 words
Transmitter for use in a transmission system as claimed in one of the preceding claims.
Claim 24
Dependent Claim
37 words
Transmitter as claimed in claim 23, characterized in that it takes the form of a device for recording the sub(band) signals and at least the first auxiliary digital signal component in a track on a record carrier.
Claim 25
Dependent Claim
13 words
Record carrier obtained by means of the transmitter as claimed in claim 24.
Claim 26
Dependent Claim
17 words
Receiver for use in a transmission system as claimed in one of the claims 1 to 22.
Claim 27
Dependent Claim
37 words
Receiver as claimed in claim 26, characterized in that it takes the form of a device for reproducing the sub(band) signals and at least the first auxiliary digital signal component from a track on a record carrier.
References Cited (Backward Citations)
No citation records indexed.
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