Patent ID: 7236836
Filing Date: 2007-06-26
Classification: G11B,H04L

Abstract:
1. A signal processing apparatus comprising: decoding means for decoding audio data in input data into a PCM digital audio signal of a prescribed number of multiple channels separated into a first channel group and a second channel group according to assignment of the multiple channels to the first channel group and the second channel group, the audio data conforming with a prescribed encoding scheme, the input data being formed with prescribed audio packs containing the audio data, the audio data having information about the assignment of the multiple channels and having information about a sampling frequency for the first channel group and information about a sampling frequency for the second channel group, the audio data resulting from encoding inclusive of loss-less compression in conformity with the DVD-Audio standards; and packeting processing means for making packets in a format of a prescribed protocol, each of the packets having a packet header and a data field; wherein the packeting processing means comprises: 1) means for placing the information about the assignment of the multiple channels, the information about the sampling frequency for the first channel group, and the information about the sampling frequency for the second channel group in a prescribed area in a real-data recording area except a CIP (Common Isochronous Packet) header in the data field, and also placing at least one of a down sampling flag, a down mix flag, and a dequantization flag in the prescribed area; and 2) means for placing bit length information representative of an effective bit length of a segment of the PCM digital audio signal at a position adjacently preceding the segment of the PCM digital audio signal as an identifier for the segment of the PCM digital audio signal in the real-data recording area.