Koninklijke Philips Corporation N.v.

U.S. Philips Corporation

Fre J Jorritsma

Wilhelmus Jacobus Van Gestel

Ronald W Saeijs

Ronald W J J Saeijs

Onno Eerenberg

An apparatus for recording a digital information signal in the form of an information file on a record carrier includes input apparatus for receiving the digital information signal, processing apparatus for processing the digital information signal into an information file, and writing apparatus for writing the information file on the record carrier in sections having a predetermined memory size. The apparatus further includes apparatus for generating characteristic point information (CPI) for inclusion in a CPI sequence. The characteristic point information identifies a characteristic point in the information file. The CPI sequence is formatted and CPI information for several CPI sequences is shared.

Signal processing on information files so as to obtain characteristic point information sequences

A recording apparatus, for recording an information signal in at least one track on a record carrier. The information signal comprises packets (P.sub.i) that may occur irregularly as a function of time in the serial datastream of the information signal. The apparatus comprises an input terminal for receiving the information signal, a channel encoding unit for channel encoding the information signal into a channel encoded information signal and a writing unit for writing the channel encoded information signal in said at least one track on the record carrier. The channel encoded information signal comprises frames of information. A frame of information may be recorded in a group of n subsequent tracks (Tr0 to Tr11), when the recording apparatus is a recording apparatus of the helical scan type, where n is an integer larger than 1. The apparatus further comprises a time stamp generator unit for generating time stamps (TS.sub.i) having a relation to the moment of occurrence of a packet comprised in the information signal received. Further, a combining unit is present for combining a packet and its corresponding time stamp so as to obtain a composite packet (P.sub.i '). The time stamp generator unit comprises a counter for generating subsequent cycles of subsequent count values, said cycles coinciding in time with the recording of subsequent frames in said at least one track on the record carrier. In response to the detection of the occurrence of a packet in said information signal, a time stamp for said packet is generated, which time stamp has a specified relationship to the count value of said counter means at said moment of occurrence of said packet.

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Eindhoven, Netherlands

Fre J Jorritsma