# US 2008/0186217 A1 · Low pin count high speed interface for video and audio codec applications

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- Number: US 2008/0186217 A1
- Document ID: US20080186217A1
- Status: Published application
- Kind: A1
- Application number: 11/672,036
- Filed: 2007-02-06
- Published: 2008-08-07
- Earliest claimed: 2007-02-06
- Inventors: Lei Chen; Dinesh Venkatachalam
- Web page: https://patentgrep.com/patent/US20080186217A1

## CPC

- H04B 14/06: using differential modulation, e.g. delta modulation
- H04B 1/40: Circuits
- H04B: TRANSMISSION

## Abstract

A receiver is provided that comprises at least one tuner. The tuner comprises a housing or packaging wall inclosing at least some elements of the tuner. The tuner further comprises at least one pin or lead leading outside or away from the housing, and a sigma-delta modulator receiving an analog input stream having at least one frequency from at least one tuner and output at least 1-bit data stream, with each 1-bit data stream associated with a physical communications line terminating on the lead or pin. The receiver has at least one digital filter digitally coupled to the sigma-delta modulator for filtering the at least 1-bit data stream.

## Claims

### Claim 1

A combined interface device disposed between an analog realm and a digital realm, the interface comprising:
a sigma-delta modulator receiving an analog input stream having at least one frequency from at least one tuner and output at least one 1-bit data stream, with each 1-bit data stream associated with a physical communications line; and
at least one digital filter digitally coupled to the delta-sigma modulator for filtering the at least 1-bit data stream.

### Claim 2 (depends on 1)

The combined interface device of claim 1, wherein the analog input stream is associated with a wireless signal received from at least one antenna.

### Claim 3 (depends on 1)

The combined interface device of claim 1, wherein the analog input stream.

### Claim 4 (depends on 1)

The combined interface device of claim 1, wherein the digital filter comprises a digital low pass filter.

### Claim 5 (depends on 1)

The combined interface device of claim 1, wherein the digital filter comprises a decimation filter.

### Claim 6 (depends on 1)

The combined interface device of claim 1, wherein the at least one frequency comprises a baseband frequency.

### Claim 7 (depends on 1)

The combined interface device of claim 1, wherein the at least one frequency comprises an intermediate frequency (IF).

### Claim 8

A tuner comprising:
a housing or packaging wall inclosing at least some elements of the tuner;
at least one pin or lead leading outside or away from the housing: and
a sigma-delta modulator receiving an analog input stream having at least one frequency from at least one tuner and output at least 1-bit data stream, with each 1-bit data stream associated with a physical communications line terminating on the lead or pin.

### Claim 9 (depends on 1)

The tuner of claim 1, wherein the analog input stream.

### Claim 10 (depends on 1)

The tuner of claim 1, wherein the at least one frequency comprises a baseband frequency.

### Claim 11 (depends on 1)

The tuner of claim 1, wherein the at least one frequency comprises an intermediate frequency (IF).

### Claim 12 (depends on 1)

The tuner of claim 1, wherein the analog input stream is associated with a wireless signal received from at least one antenna.

### Claim 13

A receiver comprising:
at least one tuner, the tuner comprising,
a housing or packaging wall inclosing at least some elements of the tuner;
at least one pin or lead leading outside or away from the housing: and
a sigma-delta modulator receiving an analog input stream having at least one frequency from at least one tuner and output at least 1-bit data stream, with each 1-bit data stream associated with a physical communications line terminating on the lead or pin; and
at least one digital filter digitally coupled to the sigma-delta modulator for filtering the at least 1-bit data stream.

### Claim 14 (depends on 13)

The receiver of claim 13, wherein the analog input stream is associated with a wireless signal received from at least one antenna.

### Claim 15 (depends on 13)

The receiver of claim 13, wherein the analog input stream.

### Claim 16 (depends on 13)

The receiver of claim 13, wherein the digital filter comprises a digital low pass filter.

### Claim 17 (depends on 13)

The receiver of claim 13, wherein the digital filter comprises a decimation filter.

### Claim 18 (depends on 13)

The receiver of claim 13, wherein the at least one frequency comprises a baseband frequency.

### Claim 19 (depends on 13)

The receiver of claim 13, wherein the at least one frequency comprises an intermediate frequency (IF).

### Claim 20 (depends on 13)

The receiver of claim 13, wherein the at least one tuner comprises a DTV tuner.

### Claim 21 (depends on 13)

The receiver of claim 13, wherein the at least one tuner comprises a GSM tuner.

### Claim 22 (depends on 13)

The receiver of claim 13, wherein the at least one tuner comprises a CDMA tuner.

### Claim 23 (depends on 13)

The receiver of claim 13, wherein the at least one tuner comprises a WiMax tuner.