Method and device for insertion of asynchronous data in a digital signal

Method for insertion of samples representing digital data from a first source having a first bit rate in a digitized signal from a second source having a second bit rate, wherein the second bit rate is greater than the first bit rate, and each data of the first source is associated with at least one sample of a series of samples at the second bit rate, the sample being presented to a polyphase filter for which a set of coefficients is associated with a specific phase error previously introduced by said associations, the filtered samples being included in the digitized signal, wherein the association of the data of the first source with samples whose bit rate is that of the second source is carried out such that, on average, a data from the first source is associated substantially with Q samples, where:

• Q=Fp/Fb
• Fb and Fp being respectively the bit rates of the first and second sources.

Method for insertion of samples representing digital data from a first source having a first bit rate in a digitized signal from a second source having a second bit rate, wherein the second bit rate is greater than the first bit rate, and each data of the first source is associated with at least one sample of a series of samples at the second bit rate, the sample being presented to a polyphase filter for which a set of coefficients is associated with a specific phase error previously introduced by said associations, the filtered samples being included in the digitized signal, wherein the association of the data of the first source with samples whose bit rate is that of the second source is carried out such that this M data from the first source are associated with N samples, where M and N are the smallest integer values for which:

• Fp/Fb=N/M
• Fb and Fp being respectively the bit rates of the first and second sources.

Method for insertion of samples representing digital data from a first source having a first bit rate in a digitized signal from a second source having a second bit rate, wherein the second bit rate is greater than the first bit rate, and each data of the first source is associated with at least one sample of a series of samples at the second bit rate, the sample being presented to a polyphase filter for which a set of coefficients is associated with a specific phase error previously introduced by said associations, the filtered samples being included in the digitized signal, wherein said samples emitted at a bit rate Fp from the second source carry a data from the first source when theoretical repetition rate becomes greater than a current repetition rate, the theoretical repetition rate being a ratio Fp/Fb, the current repetition rate being the ratio between the number of samples emitted and the number of different data emitted by the first source, and wherein all other samples carry a null value.

Device for insertion of samples representing digital data from a first source having a first bit rate in a digitized signal from a second source having a second bit rate, wherein the second bit rate is greater than the first bit rate, said device including means of association of the data from the first source with one or more samples at the bit rate of the second source, means of polyphase filtering said samples whose sets of coefficients depend on phase errors previously introduced, and means of inclusion of the filtered samples in the digitized signal.