US6691086B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital sub-band transmission system with transmission of an additional signal
Assignee: Tdf Sas
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Filing: 2001-07-19
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Granted: 2004-02-10
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Expires: 2021-07-19
Abstract
Abstract Reproduction accuracy of a digital signal, representing for example stereo audio signals, is improved by transmitting sample data which have been encoded to form transmission signals. The transmission signals are arranged in consecutive frames, each frame including a plurality of information packets, and each information packet including N bits. The number of information packets in a frame is determined by the ratio of the product of the transmission bit-rate and the number of samples represented in the frame, to the product of the number of bits in a packet and the sampling frequency. The transmission signals are recorded in a record carrier, or are transmitted in real time. In a digital stereo audio signal embodiment, the samples may be sub-band encoded or transform encoded. The transmission signal may include an indicator signal indicating a combination of certain samples, or scale factor signals for specific components of the sampled signal.
Inventors
- 👤 Gerardus C. P. Lokhoff
- 👤 Yves-Francois Dehery
- 👤 Gunther Josef Stoll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:31
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/66; H04B1/667; G; G10; G10L; G10L19/00; G10L19/02; G10L19/0204; G11; G11B; G11B20/00; G11B20/00007; G11B20/10; G11B20/10527; G11B20/12; G11B27/00; G11B27/10; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; H04B1/665; H04H; H04H20/00; H04H20/86; H04H20/88; H04H40/00; H04H40/18; H04H40/27; G11B20/00086; G11B2020/10537; G11B2020/10592; G11B2020/10601; G11B2220/00; G11B2220/90; G11B2220/91; G11B2220/913; G11B2220/93
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
268 words
A digital transmission system having a transmitter and a receiver, for transmitting a wide-band digital audio signal, comprising at least two signal components including 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 to form a number n of sub-signals for each of the at least two signal components; data reducing means for data reducing the n sub-signals of each of the at least two signal components; and transmission means for transmitting the data-reduced sub-signals via the transmission medium, and the receiver comprising: receiving means for receiving the data-reduced sub-signal; data expansion means for data expanding the received data-reduced sub-signals to form 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 to form replicas 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 transmitter further comprising: means for generating a composite transmission signal comprising frames, a frame including a first frame portion comprising synchronization information, a second frame portion comprising a block of data of the data reduced sub signals, and a third frame portion located after the second frame portion in said frame, said third frame portion comprising a block of data of the auxiliary digital signal, and the receiver further comprising: derivation means for deriving said at least one auxiliary digital signal component from third frame portions in frames of the composite transmission signal received.
Claim 2
Dependent Claim
268 words
A digital transmission system having a transmitter and a receiver, for transmitting a wide-band digital audio signal, comprising at least two signal components including 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 to form a number n of sub-signals for each of the at least two signal components; data reducing means for data reducing the n sub-signals of each of the at least two signal components; and transmission means for transmitting the data-reduced sub-signals via the transmission medium, and the receiver comprising: receiving means for receiving the data-reduced sub-signal; data expansion means for data expanding the received data-reduced sub-signals to form 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 to form replicas 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 transmitter further comprising: means for generating a composite transmission signal comprising frames, a frame including a first frame portion comprising synchronization information, a second frame portion comprising a block of data of the data reduced sub signals, and a third frame portion located after the second frame portion in said frame, said third frame portion comprising a block of data of the auxiliary digital signal, and the receiver further comprising: derivation means for deriving said at least one auxiliary digital signal component from third frame portions in frames of the composite transmission signal received.
Claim 3
Dependent Claim
170 words
A transmitter for transmitting a wide-band digital audio signal, comprising at least two signal components including 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 to form a number n of sub-signals for each of the at least two signal components; data reducing means for data reducing the n sub-signals of each of the at least two signal components; and transmission means for transmitting the data-reduced sub-signals via the transmission medium, characterized in that the transmitter is further adapted to transmit at least a first auxiliary digital signal component, the transmitter further comprising; means for generating a composite transmission signal comprising frames, a frame including a first frame portion comprising synchronization information, a second frame portion comprising a block of data of the data-reduced sub-signals and a third frame portion located after the second frame portion in said frame, said third frame portion comprising a block of data of the auxiliary digital signal.
Claim 4
Dependent Claim
170 words
A transmitter for transmitting a wide-band digital audio signal, comprising at least two signal components including 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 to form a number n of sub-signals for each of the at least two signal components; data reducing means for data reducing the n sub-signals of each of the at least two signal components; and transmission means for transmitting the data-reduced sub-signals via the transmission medium, characterized in that the transmitter is further adapted to transmit at least a first auxiliary digital signal component, the transmitter further comprising; means for generating a composite transmission signal comprising frames, a frame including a first frame portion comprising synchronization information, a second frame portion comprising a block of data of the data-reduced sub-signals and a third frame portion located after the second frame portion in said frame, said third frame portion comprising a block of data of the auxiliary digital signal.
Claim 5
Dependent Claim
40 words
The transmitter as claimed in claim 2 , characterized in that the analysis filter means filters the at least one auxiliary signal component to obtain a number n of sub-signals for each of said at least one auxiliary signal components.
Claim 6
Dependent Claim
36 words
The transmitter as claimed in claim 2 , characterized in that the data reducing means data reduces the at least one auxiliary digital signal component to form a data-reduced version of the auxiliary digital signal component.
Claim 7
Dependent Claim
103 words
The transmitter as claimed in claim 2 , characterized in that the analysis filter means filters the at least first and second audio signal components to form a number n of sub-band signals for each of the at least first and second audio signal components, the data reducing means data reduces the n sub-band signals of each of the at least first and second audio signal components, the transmission means transmits the data-reduced sub-band signals via the transmission medium, and the means for generating the composite transmission signal stores a block of data of the data-reduced sub-band signals in the second frame portion.
Claim 8
Dependent Claim
40 words
The transmitter as claimed in claim 5 , characterized in that the analysis filter means filters the at least one auxiliary signal component to a number n of sub-band signals for each of said at least one auxiliary signal components.
Claim 9
Dependent Claim
48 words
The transmitter as claimed in claim 2 , characterized in that the transmitter further comprises: control signal generator means for generating a signal type control signal indicating the type of said at least one auxiliary digital signal component, the transmission means further transmitting said signal type control signal.
Claim 10
Dependent Claim
50 words
The transmitter as claimed in claim 2 , characterized in that the transmitter further comprises: 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 transmission means further transmitting said signal presence control signal.
Claim 11
Dependent Claim
26 words
The transmitter as claimed in claim 2 , characterized in that the at least one auxiliary digital signal component is a third digital audio signal component.
Claim 12
Dependent Claim
69 words
The transmitter as claimed in claim 9 , characterized in that the transmitter transmits a first and a second auxiliary digital signal component in the form of a third and a fourth digital audio signal component, respectively, stored in third frame portions of the frames, that the control signal generator means generates a signal type control signal indicating the type of said third and fourth digital audio signal components.
Claim 13
Dependent Claim
29 words
The transmitter as claimed in claim 10 , characterized in that the first, second, third and fourth digital signal components are the four components of a surround-sound audio signal.
Claim 14
Dependent Claim
89 words
The transmitter as claimed in claim 2 , characterized in that the data reducing means comprises means for quantizing the respective sub-signals to form quantized sub-signals for each of the at least two audio signal components, in that the second frame portion of a frame comprises allocation information which, for at least a number of sub-signals, indicates the number of bits representing the samples of the quantized sub-signals derived from said sub-signals, and in that the second frame portion comprises the samples of the at least said quantized sub-signals.
Claim 15
Dependent Claim
88 words
The transmitter as claimed in claim 12 , wherein the sub-signals are in the form of sub-band signals, and the quantization means quantizes the sub-band signals into quantized sub-band signals, characterized in that for at least a number of the sub-band signals, the allocation information in the second frame portion of a frame specifies the number of bits representing the samples of the quantized sub-band signals derived from said sub-band signals, and in that the second frame portion comprises the samples of at least said quantized sub-band signals.
Claim 16
Dependent Claim
61 words
The transmitter as claimed in claim 12 , characterized in that, in addition, the second frame portion includes information related to scale factors, a scale factor being associated with at least one of the quantized sub-signals contained in the second frame portion, and in that the scale factor information is included in the second frame portion before the quantized sub-band signals.
Claim 17
Dependent Claim
24 words
The transmitter as claimed in claim 7 , characterized in that the third frame portion of the frames comprises the signal type control signal.
Claim 18
Dependent Claim
28 words
The transmitter as claimed in claim 2 , characterized in that the third frame portion also includes a scale factor for the at least one auxiliary signal component.
Claim 19
Dependent Claim
28 words
The transmitter as claimed in claim 2 , characterized in that the third frame portion also includes bit allocation information for the at least one auxiliary signal component.
Claim 20
Dependent Claim
39 words
The transmitter as claimed in claim 2 , characterized in that the transmitter takes the form of a device for recording the sub-signals and at least the first auxiliary digital signal component in a track on a record carrier.
Claim 21
Dependent Claim
196 words
A receiver for receiving a wide-band digital audio signal comprising at least a first and a second audio signal component from a transmission medium, the receiver comprising: receiving means for receiving a composite transmission signal comprising data-reduced sub signals; data expansion means for data expanding the received data-reduced sub-signals to form replicas of the sub-signals; and a decoder having synthesis filter means for combining sub-signals for each of the at least two audio signal components to form a replica of the at least first and second audio signal components, characterized in that the composite transmission signal further includes at least a first auxiliary digital signal component, the composite transmission signal comprising frames, a frame including a first frame portion comprising synchronization information, a second frame portion comprising a block of data of the data reduced sub signals and a third frame portion located after the second frame portion in said frame, said third frame portion comprising a block of data of the auxiliary digital signal, and the receiver further comprising: derivation means for deriving said at least one auxiliary digital signal component from the third frame portions in the frames of the composite transmission signal received.
Claim 22
Dependent Claim
196 words
A receiver for receiving a wide-band digital audio signal comprising at least a first and a second audio signal component from a transmission medium, the receiver comprising: receiving means for receiving a composite transmission signal comprising data-reduced sub signals; data expansion means for data expanding the received data-reduced sub-signals to form replicas of the sub-signals; and a decoder having synthesis filter means for combining sub-signals for each of the at least two audio signal components to form a replica of the at least first and second audio signal components, characterized in that the composite transmission signal further includes at least a first auxiliary digital signal component, the composite transmission signal comprising frames, a frame including a first frame portion comprising synchronization information, a second frame portion comprising a block of data of the data reduced sub signals and a third frame portion located after the second frame portion in said frame, said third frame portion comprising a block of data of the auxiliary digital signal, and the receiver further comprising: derivation means for deriving said at least one auxiliary digital signal component from the third frame portions in the frames of the composite transmission signal received.
Claim 23
Dependent Claim
54 words
The receiver as claimed in claim 19 , characterized in that the at least one auxiliary digital signal component is in the form of n sub-signals, the synthesis filter means further combining the sub-signals of the at least one auxiliary signal component to form a replica of the at least one auxiliary signal component.
Claim 24
Dependent Claim
60 words
The receiver as claimed in claim 19 , characterized in that the at least one auxiliary digital signal component received is a data-reduced version of said auxiliary digital signal component, the data expansion means in the receiver further data expanding the received data-reduced version of the auxiliary digital signal component to form said replica of said auxiliary digital signal component.
Claim 25
Dependent Claim
78 words
The receiver as claimed in claim 19 , characterized in that the receiving means receives sub-band signals for each of the at least two audio signal components, the data expansion means further data expanding the received data-reduced sub-band signals to form said replicas of the sub-band signals, the synthesis filter means further combining the sub-band signals for each of the at least two signal components to form a replica of the at least first and second signal components.
Claim 26
Dependent Claim
58 words
The receiver as claimed in claim 19 , characterized in that the at least one auxiliary signal component is in the form of a number n of sub-band signals, the synthesis filter means further combining the sub-band signals of the at least one auxiliary signal component to form a replica of the at least one auxiliary signal component.
Claim 27
Dependent Claim
70 words
The receiver as claimed in claim 19 , characterized in that the composite transmission signal comprises a signal type control signal indicating the type of said at least one auxiliary digital signal component, the receiver further comprising detection means for detecting said signal type control signal, the derivation means deriving, in response to said signal type control signal, said at least one auxiliary digital signal component from the signal received.
Claim 28
Dependent Claim
72 words
The receiver as claimed in claim 19 , characterized in that the composite transmission signal comprises a signal presence control signal indicating the presence or absence of said at least one auxiliary digital signal component, the receiver further comprising detection means for detecting said signal type control signal, the derivation means deriving, in response to said signal presence control signal, said at least one auxiliary digital signal component from the signal received.
Claim 29
Dependent Claim
58 words
The receiver as claimed in claim 24 , characterized in that the composite transmission signal comprises a third and a fourth digital audio signal component stored in third frame portions of the frames, the derivation means deriving, in response to said signal type control signal, said third and fourth digital audio signal component from the transmission signal received.
Claim 30
Dependent Claim
39 words
The receiver as claimed in claim 19 , characterized in that the receiver takes the form of a device for reproducing the sub-signals and at least the first auxiliary digital signal component from a track on a record carrier.
Claim 31
Independent Claim
155 words
A method for transmitting a wide-band digital audio signal comprising at least a first and a second audio signal component via a transmission medium, the method comprising the steps: filtering the signal components to form a number n of sub-signals for each of the at least first and second signal components; data reducing the n sub-signals of each of the at least first and second signal components; and transmitting the data-reduced sub-signals via the transmission medium, characterized in that the method further comprises the steps: transmitting at least a first auxiliary digital signal component by generating a composite transmission signal comprising frames, a frame including a first frame portion comprising synchronization information, a second frame portion comprising a block of data of the data reduced sub signals and a third frame portion located after the second frame portion in said frame, said third frame portion comprising a block of data of the auxiliary digital signal.
Claim 32
Independent Claim
155 words
A method for transmitting a wide-band digital audio signal comprising at least a first and a second audio signal component via a transmission medium, the method comprising the steps: filtering the signal components to form a number n of sub-signals for each of the at least first and second signal components; data reducing the n sub-signals of each of the at least first and second signal components; and transmitting the data-reduced sub-signals via the transmission medium, characterized in that the method further comprises the steps: transmitting at least a first auxiliary digital signal component by generating a composite transmission signal comprising frames, a frame including a first frame portion comprising synchronization information, a second frame portion comprising a block of data of the data reduced sub signals and a third frame portion located after the second frame portion in said frame, said third frame portion comprising a block of data of the auxiliary digital signal.
Claim 33
Dependent Claim
137 words
A record carrier having a wide-band digital audio signal comprising at least a first and a second audio signal component recorded thereon, the at least first and second audio signal components being filtered into a number n of sub-signals for each of the at least first and second audio signal components and being data reduced to form data-reduced sub-signals, the data-reduced sub-signals being combined together with at least a first auxiliary digital signal into a composite transmission signal, the composite transmission signal comprising frames, a frame including a first frame portion comprising synchronization information, a second frame portion comprising a block of data of the data reduced sub signals, and a third frame portion located after the second frame portion in said frame, said third frame portion comprising a block of data of the auxiliary digital signal.
Claim 34
Dependent Claim
137 words
A record carrier having a wide-band digital audio signal comprising at least a first and a second audio signal component recorded thereon, the at least first and second audio signal components being filtered into a number n of sub-signals for each of the at least first and second audio signal components and being data reduced to form data-reduced sub-signals, the data-reduced sub-signals being combined together with at least a first auxiliary digital signal into a composite transmission signal, the composite transmission signal comprising frames, a frame including a first frame portion comprising synchronization information, a second frame portion comprising a block of data of the data reduced sub signals, and a third frame portion located after the second frame portion in said frame, said third frame portion comprising a block of data of the auxiliary digital signal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-02-09 | 2007-08-11 | 2008-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-02-09 | 2011-08-11 | 2012-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-02-09 | 2015-08-11 | 2016-02-10 | $7700.00 | Window Closed / Lapsed |