US 6,807,233 B1 · Sample data transmitting method, receiving method, transmission/reception method and its transmission apparatus, reception apparatus, transmission/reception apparatus

Abstract

In order to transmit and receive sample data of different sampling frequencies collectively, the first row of a packet is composed of four bytes and the first and second rows are provided with headers prescribed by the IEEE1394 standard. Also, the second byte in the third row is provided with the first counted value of a data block counter and a fourth byte is provided with a next to the last counted value (DBC) of the data block counter. Further, latter half two bytes in the fourth row are provided with a value of a reference time (time stamp data). The first two bits in the fifth row are provided with values showing recording media, the fourth bits are provided with flags showing sampling frequencies, the seventh and eighth bits are provided with values showing quantized bit numbers, and the second three bytes and after are provided with sample data. The last row of the packet is provided with an error correcting code for data transmitted in and after the third row.

Claims25

Dependent claims

A sample data transmitting method for transmitting first data portions sampled at a first sampling frequency and second data portions sampled at a second sampling frequency, wherein said first sampling frequency is higher than said second sampling frequency by an integer multiplier of said second sampling frequency, the method comprising the steps of:

forming a plurality of data blocks of said first data portions sampled at said first sampling frequency and said second data portions sampled at said second sampling frequency,
generating a first count value when a first data block of said plurality of data blocks is formed and a second count value when a last data block of said plurality of data blocks is formed,
forming a transmission packet including said first and second count values as a header and said plurality of data blocks, and
transmitting said transmission packet formed in said step of forming the transmission packet.

1 more element

A sample data transmission and reception method for transmitting a plurality of transmission packets each formed of first data portions sampled at first sampling frequency and second data portions sampled at a second sampling frequency, wherein said first sampling frequency is higher than said second sampling frequency by an integer multiplier of said second sampling frequency, wherein

a transmitting side collects together in predetermined cycles said first and second data portions during a sampling period of said second sampling frequency to form a plurality of data blocks in each transmission packet, generates a first counted value when a first data block of said plurality of data blocks in a transmission packet is formed and generates a second counted value when a last data block of said plurality of data blocks in the transmission packet is formed, and adds the first and second count values as a header to the transmission packet including the plurality of data blocks;
and
a receiving side forms a second clock signal of said second sampling frequency, forms a first clock signal of said first sampling frequency by multiplying said second clock signal, and forms discriminating data of the first counted value and the second counted value contained in the header of each transmission packet to reconstruct said plurality of data blocks upon reception.

A sample data receiving apparatus for receiving a transmitted signal consisting of

first data portions sampled at a first sampling frequency and second data portions sampled at a second sampling frequency, wherein the first sampling frequency is higher than said second sampling frequency by an integer multiplier of said second sampling frequency, and in which
said first and second data portions generated during a sampling period of said second sampling frequency are collected in predetermined cycles to form a plurality of data blocks in each transmission packet, and generating counter data corresponding to a first counted value when a first data block of said plurality of data blocks is formed and corresponding to a second counted value when a last data block of said plurality of data blocks is formed, wherein the first counted value and the second counted value are added as a header to the plurality of data blocks to form the transmission packet for transmission, the apparatus comprising:
means for forming a second clock signal of said second sampling frequency in response to a received signal;
means for forming a first clock signal of said first sampling frequency from said second clock signal, and
means for discriminating data of the first count value and the second count value contained in the header of each transmission packet to reconstruct a data row of said data block for reception.

2 more elements

A sample data transmission and reception apparatus for transmitting a plurality of transmission packets formed of first data portions sampled at a first sampling frequency and second data portions sampled at a second sampling frequency, wherein the first sampling frequency is higher than said second sampling frequency by an integer multiplier of said second sampling frequency, the apparatus comprising;

means for transmitting a transmission packet including a plurality of data blocks formed by collecting first and second data portions generated during a sampling period of said second sampling frequency and including counter data corresponding to a first counted value when a first data block of the plurality of data blocks is formed and a second counted value when a last data block of the plurality of data blocks is formed, wherein the first and second counted values are added as a header to the plurality of data blocks in the transmission packet;
and
means for receiving including means for forming a second clock signal of said second sampling frequency, forming the first clock signal of said first sampling frequency by multiplying said second clock signal, and for discriminating said said first counted value and said second counted value contained in the header of the transmission packet to reconstruct said data blocks in the transmission packet.

Dependencies are inferred from the claim text.

Sample data transmitting method, receiving method, transmission/reception method and its transmission apparatus, reception apparatus, transmission/reception apparatus

Life of this patent

Sample data transmitting method, receiving method, transmission/reception method and its transmission apparatus, reception apparatus, transmission/reception apparatus

Life of this patent

Abstract

Claims25